During the Wild West, many towns popped up along the trail and eventually went on to become ghost towns. Military bases, though, have sometimes become “ghost bases” – abandoned and left to rot.
Some of these ghost bases are near cities like the Big Apple. Others, like Johnston Atoll, are pretty far off – a nice getaway spot, if not for the history of being used as a storage center for Agent Orange and other interesting stuff.
The climates can be very different – from the burning sands of Johnston Atoll to the frozen flatlands of North Dakota, where America briefly operated a ballistic-missile defense system known as SAFEGUARD.
One base in Croatia that once was home for almost 50 fighter jets was abandoned during the Yugoslav civil war of 1991 – and the wrecks are mostly used by folks seeking some adventure. That base still gets “official” use for law enforcement training.
A damaged runway at the Zeljava Air Base in Croatia. (Photo from Wikimedia Commons)
You can even check out one abandoned facility that will soon fall into the Pacific. No, not Johnston Atoll (it was a re-claimed coral atoll built over the years long before China did the same thing in the South China Sea), but instead the Devil’s Slide bunker on the California coast. A lack of maintenance and the natural process of erosion will eventually send this coastal-defense bunker tumbling from commanding heights and into the Pacific.
But if you want one “ghost base” that has captured imaginations worldwide, you can go to either the Ukraine or Siberia to see the Duga Radar Array – an early-warning system meant to detect American missiles. Or just pick up the video games “Call of Duty: Black Ops” and “Stalker” to see representations of the array used.
So, take a peek at this video that tells more about these and some other “ghost bases” – and tell us which “ghost base” you would like to know more about.
There are things that can annoy you during your time in uniform, like PowerPoint presentations, waiting to be released for the weekend, and that private who clearly needed a waiver to get in. Wait, that’s not a private, that’s a lieutenant!
And then there are things that can kill you.
The US military has been at war for nearly 20 years, and anyone who has wanted to test their mettle in combat has had the chance. Thanks to modern battlefield medicine and overwhelming fire superiority in most situations, American service members are coming home alive at rates that have never before been seen in the history of warfare.
US Army soldiers fire 81mm mortars during a fire mission in an undisclosed location in Southwest Asia, Nov. 6, 2019. US Army photo by Staff Sgt. Alex Manne.
Unfortunately, it’s not just bullets and IEDs that can — and do — kill our men and women in uniform. In fact, 74% of all US military deaths since 2006 have had nothing to do with combat.
1. Training. Train like you fight, fight like you train. It’s a good ethos to have in the business of war, but unfortunately, realistic training can have unintended consequences. Most recently, eight Marines and one US Navy sailor were killed when their Amphibious Assault Vehicle (AAV) sunk during training off San Clemente Island. This isn’t a common occurrence, but in 2017, 14 Marines and one sailor were hospitalized after their AAV hit a natural gas line. The last death occurred in 2011 after a Marine died while trapped in a sunken AAV in Oceanside Harbor.
Training accidents happen on land and in the air, too.
Special Forces Soldiers from the US Army’s 10th Special Forces Group (Airborne) conduct an AAR after Counter Improvised Explosive Device training at Panzer Local Training area near Stuttgart, Germany, June 10, 2020. Photo by Sgt. Patrik Orcutt, courtesy of DVIDS.
Between 2015 and 2018, the US Army suffered 14 fatalities from vehicle rollovers. That number spiked in 2019, with eight soldiers killed in rollover accidents. According to a US Army safety brief video, vehicle training accidents kill more on-duty soldiers than any other single reason, with inadequate unit driver training programs contributing to 68% of these mishaps.
Airborne operations are inherently risky and are considered the most dangerous training the military conducts on a regular basis despite rigorous risk mitigation procedures. So far in 2020, there have been at least two deaths, preceded by four in 2019. The fatalities affect conventional and special operations troops alike while conducting both static line and military free fall training across the US Army, US Navy, US Marine Corps, and US Air Force.
Training accidents are readily apparent in how they impact the force, while other issues are not so obvious — or forgivable.
Senior Airman Frances Gavalis, 332nd Expeditionary Logistics Readiness Squadron equipment manager, tosses unserviceable uniform items into a burn pit, March 10, 2008. US Air Force photo by Sr. Airman Julianne Showalter.
2. Toxic exposure. Although burn pits have been reduced to an oft-joked about condition of wartime service, their impacts on service members who served overseas are real. Toxic exposure from burn pits is difficult to track, but one organization says they have recorded at least 130 deaths from the more than 250 burn pits that were used across Iraq and Afghanistan. Many compare the issue to how Agent Orange afflicted veterans of the Vietnam War. Like Agent Orange, the full effects of burn pits will likely take decades of research before it’s impact on veterans is fully understood.
If you’ve deployed to Afghanistan, you’ve probably heard about “Mefloquine Monday” and the nightmares it causes. Due to the areas of the world the US military regularly deploys to, a variety of malaria medications have been used for decades, with some having detrimental effects on service members. Mefloquine, in particular, was considered so dangerous that the FDA put a “black box” warning — its most strict measure — on the drug in 2013. It’s difficult to attribute how many deaths are a result of the drug, but the drug’s effects on the brain may be contributing to suicide rates.
Military housing has come under fire in recent years for failing to address issues ranging from black mold to lead poisoning and even asbestos poisoning. The problem affects everyone in the military umbrella, from junior enlisted soldiers in barracks to families living in on-base housing. Despite multiple lawsuits, the US military still grapples with some leaders not taking the issue seriously — even though it’s now affecting service members’ children.
Members of the Uzbekistan National Guard show a US special operator de-mining techniques during exercise Invincible Sentry in the Tashkent region of Uzbekistan, Feb. 22, 2020. Photo by Staff Sgt. Steven Colvin, courtesy of DVIDS.
Depleted uranium has also affected multiple generations of US military personnel, with many suffering through cancer and other afflictions after being exposed.
Most recently, government documents revealed that the military knew Uzbekistan’s K2 airbase was poisoning service members stationed there.
“Ground contamination at Karshi-Khanabad Airfield poses health risks to U.S. forces deployed there,” said the classified report obtained by McClatchy dated Nov. 6, 2001. According to a 2015 Army investigation, at least 61 service members have been diagnosed with cancer or died after serving there, but that number does not include special operations troops at the secretive base.
There are many organizations available to help service members who have been impacted by toxic exposures. Veterans who are experiencing unexplained health issues are encouraged to reach out for help.
Lt. Gen. Mark Milley, III Corps and Fort Hood commanding general, and US Senator John Cornyn take questions from reporters during a press conference outside the main gate at Fort Hood, Texas, April 3, 2014. US Army photo by Sgt. Ken Scar, 7th Mobile Public Affairs Detachment.
3. Fort Hood. K2 isn’t the only base responsible for death in the military. Fort Hood is quickly becoming known as one of the most dangerous places to be stationed in the US Army after a rash of murders and busted prostitution rings have been exposed. Twenty-three soldiers assigned to the Texas base have died this year alone; only one of those deaths happened in combat. The murder and dismemberment of Spc. Vanessa Guillen thrust Fort Hood’s issues into the national spotlight this year, and now multiple investigations have been initiated to find answers about why the base has devolved.
4. Suicide. Suicide afflicts both active duty troops and veterans alike. Between 2006 and 2020, 4,231 active service members died of self-inflicted wounds. In 2017, 6,139 veterans committed suicide, according to the Department of Veterans Affairs. The reasons for taking one’s life vary, but over-prescription of opioids, toxic leadership, marital problems, and financial problems are all common reasons cited. Fortunately, the military has started to take the mental health crisis more seriously in recent years, with many senior leaders stepping forward to talk about their own struggles and encouraging troops to reach out for help if they need it.
Many of these issues can only be mitigated by calling out problems when they happen and being proactive about avoiding safety shortfalls. If you see something, say something. These problems won’t go away on their own.
On Apr. 24, 1951, Cpl. Hiroshi Miyamura — known as “Hershey” to his men — and his squad of a dozen machine gunners and five riflemen were stationed on a Korean hill to delay the Chinese attack everyone knew was coming. The hillside was pocked with trenches and craters and littered with razor wire. At 4 in the morning, the quiet was broken by the sound of bugles and whistles as waves of Chinese regulars swarmed across the Imjin River. One of those waves breaking against Miyamura’s position.
Suddenly, he was in charge of a suicide mission.
Born and raised in Gallup, New Mexico, the son of Japanese immigrants, Miyamura served in World War II with the famed 442nd Regimental Combat Team, a Japanese-American unit that became the most decorated unit for its size and length of service in the history of America, but did not see action. He joined up again when the Korean Conflict broke out in 1950 and was trained in heavy weapons and sent to Korea.
For hours that morning, the Chinese waves beat against Miyamura’s position. Their overwhelming numbers came straight at Miyamura as his machine guns slowly eliminated the enemy squad, one man at a time. As their ammunition dwindled, Miyamura, who was directing fire, firing his carbine, and hurling grenades at the attackers, ordered his squad to fix bayonets.
At one point, the Chinese began attempting to flank the remnants of the small unit, so Miyamura attacked — by himself.
“Chinese soldiers had been cautiously moving up the slope when Miyamura suddenly appeared in their midst,” Brig. Gen. Ralph Osborne, would later announce. “Jabbing and slashing, he scattered one group and wheeled around, breaking up another group the same way.”
He then returned to his squad and began tending to the wounded, but he soon realized his position was hopeless. He ordered a withdrawal.
As the men readied to pull out, another wave of Chinese struck and Miyamura moved to an untended machine gun and fired it until he was out of ammunition. He disabled the machine gun to keep out of enemy hands and was about to join the withdrawal when the Chinese again hit his position. He bayoneted his way to a second, untended machine gun and used it to cover his men’s withdrawal until he was forced to take shelter in a bunker and kept fighting. The area in front of the bunker was later discovered to be littered with the bodies of at least 50 of the enemy combatants.
When the fighting hit a lull, Hershey found himself alone.
Now wounded in the leg by grenade shrapnel, he began to work his way back from the front at times meeting — and besting — Chinese troops in hand-to-hand combat until, exhausted and weakened, he fell into a roadside ditch and was captured.
For the next 28 months, he struggled to survive in a North Korean POW camp, believing his entire squad had been killed or wounded. He also naively feared he would face a court-marshal for having lost so many of his men. (In fact, several of the squad had survived). So, when he was finally released at the end of the fighting he weighed less than 100 pounds and faced freedom with some trepidation.
The award had been kept secret for fear of enemy retaliation, so few ever knew of Hershey’s actions on that lonely Korean hill. So it was with some surprise that Miyamura was informed by Gen. Osborne of his MOH.
“What?” he is reported to have said. ‘I’ve been awarded what medal?’
On Oct. 27, 1953, then-Sergeant Miyamura — he had been promoted while in captivity — received his award from President Dwight Eisenhower at the White House and returned to Gallup where the city’s schools were let out, businesses had been closed, and some 5,000 people greeted him as he got off the train.
By 2020, the U.S. Air Force expects to have “directed energy combat weapons pods” on its jets. During the Air Force Association Air Space conference, the Air Force General with the most Air Force name ever, Gen. Hawk Carlisle, said “I believe we’ll have a directed energy pod we can put on a fighter plane very soon. That day is a lot closer than I think a lot of people think it is.”
The lasers will be a weapon against unmanned aerial vehicles (drones), missiles, and other aircraft, according to Gen. Carlisle. The Army, Marine Corps, and the Navy, thinks of lasers as a defensive weapon. The Army, Navy, and Marines’ laser weapons are designed shoot down incoming artillery shells, rockets, and drones, their objective is developing a defensive weapon to shoot down incoming high-speed ballistic and cruise missiles.
The Air Force’s ideas for laser tactics is actually much more aggressive then Gen. Carlisle would lead us to believe. Since directed energy weapons can shoot multiple shots at the speed of light on a single gallon of gas, the Air Force sees a nearly unlimited weapon, capable of taking out not only incoming missiles, but also their source.
“My customer is the enemy. I deliver violence,” Air Force Lt Gen. Brad Heithold, head of Air Force Special Operations Command, told an audience at a directed energy conference in August 2015. Heithold wants the chance to mount such a laser onto one of AC-130 gunships.
Laser weapons are becoming much more compact and capable of being mounted on aircraft as small as a Predator drone. Portability is what makes the difference in battlefield development. Such a laser used to be the size of a passenger jet. The previous restrictively large sizes were based on their cooling methods. Liquid lasers that have large cooling systems can fire continuous beams, while solid state laser beams are more intense but must be fired in pulses to stop them from overheating.
Now, General Atomics is field testing a DARPA-funded weapon it calls “High Energy Liquid Laser Area Defense System” (or HELLADS), which is roughly five feet long.
The actual HELLADS system doesn’t have video of tests yet but here’s a similar American-Israeli system being tested to take out incoming mortar rounds.
They may seem like they’re tying troops’ hands behind their backs — especially given that today’s wars are very different from those when the former laws of war were written — but there’s a good reason why certain rules have been imposed to protect troops in combat.
While the major laws of war are well known, there are some provisions that may surprise the average reader.
#1: Filing down your bullet. (The 1899 Hague Declaration IV,3 and Geneva Convention Protocol I Art. 35)
There is always the loophole of “military necessity” — that’s why flamethrowers are okay, because they have an actual purpose if used on foliage and clearing tunnels.
So while hollow points are legal, filing down a bullet to make in improvised dum-dum round is a no no. The purpose of doing that is to cause unnecessary harm.
So that 5.56 round some jackass took a Multi-tool to to “make it hurt more” committed a serious offense.
#2: A chaplain picking up a weapon. (Geneva Convention Art. 24)
If troops become shipwrecked or parachute out of a destroyed aircraft, they now have non-combatant status. They’re technically out of the fight.
The most protected service member in the ranks is still the chaplain, who should never enter combatant status.
Regardless of their denomination, chaplains have a duty to uphold the spiritual, moral, and religious well-being of everyone on the battlefield. They will enter combat zones, but only to provide aid. To date, 419 U.S. Chaplains have died in war and eight Medals of Honor were bestowed to chaplains.
It is a part of their duty to never lose non-combatant status to help the needs of all. Picking up a weapon immediately revokes that status. If you ever wondered why armed chaplain assistants are so valuable, that’s why.
#3: Taking war trophies. (Fourth Geneva Convention. Art. 33-34)
There’s a fine line between taking a souvenir and pillaging.
Anything you take off the battlefield is pillaging — even if it belonged to an enemy combatant. It is subject to strict regulations after it’s turned over for inspection and clearance. If it’s a weapon, it must also be made unserviceable at the expense of whomever is taking it back.
Stashing it goes against tons of laws.
#4: Putting a large Red Cross on your equipment for combat operations. (Geneva Convention Protocol I Art. 85)
The Red Cross, Red Crescent, Red Crystal, and Red Shield of David are all protected as the international symbol for medical aid. When it is painted on a vehicle or on an armband, it lets everyone know that they are only there to render aid. Like chaplains having protections, so too do medics if they are performing aid and evacuation.
If a combat medic takes up arms, they lose their status as a non-combatant, which has been the norm in modern conflicts. If they drop their weapon to give aid, they regain that status.
But the red cross symbol doesn’t give you noncombatant status. If the symbol is on a piece of equipment, such as a first aid kit or pack, it is only signifying that the contents are for first aid.
#5: Not protecting journalists. (Geneva Convention Protocol I Art. 79)
War corespondents are just as protected as any other civilian on the battlefield. They must never pick up arms or else they losing their status. The difference between members of the press and other non-combatants is that they are required by their job to be in the middle of a firefight to report what is happening.
In the modern era, journalists have been easier and more valuable targets than ever. If one is embedded in a unit, no matter how pesky and nosy as they seem, they are valuable assets to the war effort and still must be protected.
#6: Insulting prisoners of war. (Third Geneva Convention. Arts. 13-16)
Writer’s Note: For the final point on this list, there will not be a photograph of a prisoner of war, regardless of nationality, in reference to their mistreatment.
One of the goals of the Hague and Geneva Convention was to protect the rights of prisoners of war. They must be given medical attention (Art. 15). They keep the civil capacities they had at the time of capture (Art. 14) and must always be treated humanely (Art. 13).
The definition of humane treatment covers no physical mutilation (including torture). This also means you must provide protection from acts of violence, intimidation, and verbal insults.
It doesn’t matter who the person is or what they did before they are captured, they are now a prisoner of war.
The Wall Street Journal reporter Rory Jones was aboard the USS Boxer in the hours before the US amphibious flattop downed an Iranian drone and recounted a series of tense encounters that led up to the engagement.
According to Jones, the Boxer was leading a flotilla of Navy ships through the Strait of Hormuz into the Persian Gulf, where Iran has repeatedly harassed international vessels. Just after 7 a.m. local time, Jones reported, an unarmed Iranian Bell 212 helicopter came so close to the Boxer that it could have landed on deck. A US helicopter chased away the Iranian craft, cutting short an incident that Capt. Ronald Dowdell, the commander of the Boxer, called “surreal.”
Shortly after, an Iranian military vessel sailed toward the Boxer flotilla, following it at 500 yards — the exact distance the Navy allows before it warns another vessel not to come closer. Jones reported that a US helicopter flew between the two ships, deterring the Iranian vessel before tailing an aircraft identified as an Iranian Y-12 surveillance plane.
The amphibious assault ship USS Boxer.
(U.S. Navy photo by Photographer’s Mate 3rd Class James F. Bartels )
After these incidents, the Iranian drone came “within a threatening range” of the Boxer, according to Chief Pentagon Spokesperson Jonathan Hoffman, prompting the US crew to take defensive action. Military.com reported that the Light Marine Air Defense Integrated System aboard the Boxer attacked the drone by jamming its signal.
INSIDER reached out to US Naval Forces Central Command to confirm Jones’ account of the hours leading up to July 18, 2019’s confrontation and didn’t receive an immediate reply. INSIDER has also reached out to the Iranian Ministry of Foreign Affairs and its mission to the UN regarding the incidents in Jones’ account.
Iran’s deputy foreign minister has denied Iranian involvement, and said that USS Boxer shot down its own drone.
This article originally appeared on Business Insider. Follow @BusinessInsider on Twitter.
Troops die in battle — it’s an unfortunate fact, but it’s the nature of the job. Countless men and women have sacrificed themselves to protect their fellow service members, their friends and family back home, and the lifestyle we enjoy here in the U.S. “Battlefield crosses” were created to honor the fallen. A deceased troop’s rifle is planted, barrel-first, into their boots (or, in some cases, the ground) and their helmet is placed atop the rifle. Like all things military, this cross is part of a long-standing tradition — a tradition that has evolved since its first use on the battlefields of the American Civil War.
Despite the fact that it’s called a cross, there’s no single religious ideology attached to the practice.
The tradition of marking the site where a troop met his end began in the Civil War. Historically, large-scale battles meant mass casualties. After armies clashed and the smoke settled, bodies were quickly removed from the field to stop the spread of disease. Blade-cut, wooden plaques were placed at temporary grave sites so that others could pay respects.
It wasn’t until World War I, when troops were issued rifles and kevlar helmets, that these wooden blocks were replaced with the crosses as we know them. To many, it was the equipment that made a trooper, so creating a memorial from that same gear was poignant.
In World War II, dog tags were standard, making troop identification easier. The tags were eventually placed on the memorials, giving a name to the troop who once carried the gear on which it was draped. When available, a pair of boots was placed at the bottom of the shrine, too.
A pair of boots, a rifle, a helmet, and some identification — there’s something eerily, symbolically beautiful about the battlefield cross, composed of the core components of a troop.
Today, given the technology, photos of the fallen are also sometimes placed near the memorial. These crosses help give troops closure and a way to pay their respects to their brothers- and sisters-in-arms.
The man in charge of waging war on ISIS explained during a teleconference with reporters Oct. 26 that Islamic State militants “make extensive use” of unmanned aircraft in their fight to keep territory in Iraq and the key city of Mosul.
Behold the dawn on Trojan Horse drones. (Photo from Friends of YPG YPJ)
The head of Combined Joint Task Force Inherent Resolve Lt. Gen. Stephen Townsend said the terrorists use the drones to video suicide strikes on Peshmerga and Iraqi forces, fly in unmanned planes to help target coalition positions and even use the drones to direct fires from mortars and rockets.
ISIS use of drones is “not episodic or sporadic, it’s relatively constant,” Townsend said. “We’ve seen them using drones to control and adjust indirect fires.”
Townsend added that the bad guys are also getting into the armed drone game, with ISIS dropping “small explosive devices” from the UAVs over coalition bases and other targets.
“Those fortunately haven’t had great effect,” he said.
But what’s really bugging him is a new more dastardly way ISIS is using drones.
“Recently we have seen what we think is a Trojan Horse kind of UAV or drone,” Townsend said.
He went on to explain that Islamic State militants landed a UAV inside coalition lines. Thinking they’d gotten an intelligence boon. When the allied forces went out to recover the drone it was detonated remotely, injuring the troops.
“We expect to see more of this, and we’ve put out procedures for our forces to be on guard for this,” Townsend said, adding that U.S. troops and others have downed many drones harassing coalition troops with small arms fire and electronic means, “with varying levels of success.”
“We’re working to try to find better solutions to this pretty thorny problem,” he said.
Mindy N. asks: After a long run my leg muscles are tired, but my heart is not. Why doesn’t the heart need any rest?
An average of around 60 to 100 times every minute of every day of every year of your ultimately meaningless life, your heart beats… until it doesn’t. Not long after it stops, all knowledge of your having existed is rapidly forgotten. Unlike the other muscles in your body, however, your heart steadfastly rages against the dying of the light, refusing to ever get tired. But how does it manage this and why are your other muscles such slackers in comparison?
To begin with, the human body is broadly composed of three types of muscles: skeletal, smooth and cardiac. Skeletal muscles are striated (banded), and are what most of us think of when we envision a muscle — controlling pretty much all voluntary, and some involuntary, body movement.
Like cardiac muscle, skeletal muscle derives energy from ATP (Adenosine triphoweknowyoudontcare), with this being made in a few different ways. To avoid going full textbook, we’ll just briefly give the high level over simplified view here. In a nutshell, the slowest, but most efficient, method of ATP production is via aerobic respiration where mitochondria in your muscle cells draw energy from the Dark Dimension, producing ATP, a small amount of which is stored in your muscles at any given time. This stored amount is a sufficient supply to last for about 3 seconds of vigorous activity, not unlike your high school boyfriend.
Diagram of the human heart.
After this supply is taxed, with the ATP converted to ADP (adenosine diphosophate) in the process, creatine phosphate in the muscles is used to convert it back to ATP. This supply will last about 8-15 seconds.
Next up, it turns out we were totally wrong about that whole Dark Dimension thing as, in fact, your muscles continue to get ATP beyond this via a series of chemical reactions resulting in glucose being used to make the needed ATP to keep going. This glucose comes from a variety of sources, such as glycogen in your muscles, or via blood via fats, protein, stores in the liver, and from your food churning away in your intestines.
There are two high level ways this production of ATP ends up being accomplished. In the first, using large supplies of oxygen. In this case, as much as 38 ATP molecules can be produced for every glucose molecule. In the second case, via anaerobic glycolysis — not requiring oxygen — only 2 molecules of ATP are produced for each molecule of glucose. While an extremely inefficient use of the available supply of glucose, this method at least produces the ATP over two times faster than aerobic respiration and continues working for a time while you’re out of breath.
Due to glycolysis resulting in the accumulation of lactic acid in the muscles, ultimately if it accumulates faster than it can be gotten rid of, it will interfere with the anaerobic glycolysis process and your muscles are going to go all jelly and cease to work as well for a little bit. This is in part why, if you get out of breath when exercising and your body is relying more on anaerobic glycolysis, you get fatigued extremely quickly. In this case, you’re simultaneously creating lactic acid at a much more rapid rate and using up your available glucose molecules faster, but producing relatively small amounts of ATP for those molecules used. Do this for more than a minute or two and it will overtax your skeletal muscles’ ability to produce the needed ATP at the rate you’re using it. (Though, again, your mileage will vary based on your current fitness level.)
Back it off and so you’re relying mostly on aerobic respiration and you’re going to get the most bang for your buck, able to keep going all night long if you keep hydrated and well fed. Slow and steady wins the race.
Unsurprisingly from all of this, the more mitochondria there are, the faster ATP can potentially be produced if the needed molecules are present and the more the muscle can keep on keeping on. As for skeletal muscle, about 2%-8% of the volume of such muscle is mitochondria, though this varies somewhat from person to person depending on your level of physical fitness.
Moving on to smooth muscle, as you may have gleaned from the name, this is smooth with no striations. Found in your hollow internal organs (except the heart), smooth muscles work automatically, helping you digest food, dilate your pupils and take a wee-wee. As an example of smooth muscle in action, in digestion, the contractions themselves are really not too dissimilar to how your heart beat works — fluctuation of electrical potential in the smooth muscle cells which causes the muscle to contract in a rhythmic fashion, in this case called the “Basic Electrical Rhythm” or BER. This rhythm is about three times per minute in the stomach, and 12 times per minute in the small intestines. The sound you are hearing when your stomach and intestines make noise is the result of these muscular contractions mixing and moving chyme (the cocktail of digestive juices, food, microbes, etc.) and air along down the tube between your mouth and your waste disposal port.
As for the mitochondrial needs of these muscles, they are typically approximately that of your skeletal muscles, with mitochondria making up about 3-5% of the smooth muscle volume.
This finally brings us to the real hero of your life story — cardiac muscle. Like skeletal muscle, cardiac muscle is striated and like the other muscle in your body is primarily powered by mitochondria. The cardiac muscles, however, have as much as 10 times the density of mitochondria as your other muscles, at about 35% of the volume of your cardiac muscle.
It should also be noted that individual muscle cells in the heart actually do get regular rest thanks to how the heart beat actually works, which we’ll get into in the Bonus Fact in a bit. But the net result is that about 60%-70% of your life a given part of your heart is actually in a resting state.
Combining these micro-rests with the extreme amount of mitochondria and a large amount of oxygen from the heart’s awesome blood supply, this allows your heart all the ATP it needs to not get tired, assuming you’re not in an extreme state of starvation or doing some extreme form of exercise for extended periods well beyond your normal fitness regime.
On that note, the downside to needing so much ATP thanks to no extended downtime is that the heart really needs to rely on aerobic respiration to make sure it doesn’t run out of ATP, and thus it doesn’t take oxygen being cut off for too long from it before you’re going to have a bad time, unlike other muscles you can just stop using to help recover the needed ATP over time.
And, yes, it turns out the human heart can actually get tired and suffer damage if you’re trying to do some extreme form of physical activity outside your norm for lengthy periods, especially if in a low oxygen environment like at high altitude. In these cases, even the healthiest hearts can suffer damage, though given the other effects on your body of such extreme physical activity, typically most people will stop doing whatever before the heart is negatively impacted in a damaging way. In essence, your legs will give out before your heart does (usually), at least when talking energy supply. But that doesn’t mean in certain cases a measurable level of tiredness in the heart can’t be observed.
For example, in 2001, cardiologists studied a few dozen endurance athletes competing in a 400 km race in Scotland, which comprised of all manner of physical activities from paddling, rope climbing, running, biking, climbing, etc. and the whole event taking almost 100 hours. During this span, the athletes typically only slept about 1 hour per 24 hours during the event and otherwise soldiered on.
The results? At the end of the race, the athletes’ hearts were only pumping about 90% of the volume per beat they’d been managing before the race started.
That said, further research on endurance athletes calls into question the notion of “no permanent damage” being done. For example, researchers involved in a 2011 British study looking at British Olympians who competed in distance running and rowing (and specifically competing in at minimum a hundred events), found that as they aged they showed marked signs of heart muscle scarring, something that can lead to irregular heart function and, potentially, heart failure.
Of course, these are extreme examples, and for most people not doing ultra marathons regularly or competing professionally or semi-professionally in endurance events, this is unlikely to be a problem and the holistic health benefits of regular, vigorous exercise are likely to make up for it even then.
Ever wonder how the heart beat works? Well, wonder no more. In a nutshell, the heart is a four chambered pump. The top two chambers are called Atria, the bottom two are called Ventricles. They are separated from top to bottom by valves; the right and left sides are separated by a septum. So what makes the pump squeeze? When the hearts muscle gets “shocked”, it will contract and force the blood down its path, with the valves not allowing blood to flow back through the system, unless they are defective.
The blood’s path through the heart starts in a vein called the Superior Vena Cava. Then it enters the right atrium, flows through the tricuspid valve into the right ventricle. From there it travels through the pulmonic valve into pulmonary arteries, then the lungs. Now back to the heart and into the left atrium, through the mitral valve. The blood is now in the “strongest” chamber of the heart, the left ventricle. From there it gets pumped through the aortic valve and into the aorta and out to the rest of the body!
So what causes that infamous electric shock the heart receives approximately 60-100 times a minute? Short answer: Dormammu. Long answer: The exchange of electrolytes across specialized cells within the heart build up a differing electrical potential on either side of the cell. When this electrical potential reaches a certain level, it discharges and sends a shock down another unique set of cells within the heart, causing a shock and thus the contraction.
The specific set of cells that regulates the heart rate (in most people) are called the Sinoatrial node or SA node for short. The SA node (pacemaker of the heart) sits in the upper portion of the R atria near the entrance of the superior vena cava.
When the SA node sends out and electrical shock, it immediately shocks the atria. The pulse then gets “held up” in another set of cells called the Atrioventricular node, or AV node for short. This then transmits the impulse down to the bundle of His and then to two pathways called the right and left bundle branches. Then it’s transmitted to the rest of the Ventricles through what are called Purkinje fibers. All together this “shock” causes the atria to contract, then the ventricles. You’re still alive! (For now.)
So what and how do these electrolytes cause this shock? In an attempt not to give a physiology lecture of ungodly proportion, we will simply say that the main two electrolytes involved are sodium and potassium. Potassium normally sits inside the cell, and sodium outside. Potassium slowly leaks outside of the cell and sodium then goes inside the cell. This creates the differing electrical potential that builds up until the point of discharge. Other electrolytes also help in creating this differential, and they are calcium and magnesium. All together the harmony created by this yin and yang system of electrical and mechanical systems come together to make that wonderfully thumping thing inside your chest!
This article originally appeared on Today I Found Out. Follow @TodayIFoundOut on Twitter.
The U.S. Air Force A-10 Thunderbolt II attack aircraft is officially about to get some surround sound.
The Air Force Life Cycle Management Center at Hill Air Force Base, Utah, on Oct. 23, 2019, awarded Terma North America Inc. a $60 million indefinite-delivery/indefinite-quantity (IDIQ) contract to retrofit 328 3D audio systems for the close-air support aircraft’s cockpit, according to a Defense Department announcement. The company is a subsidiary of Terma A/S, a Danish defense and aerospace company.
Pilots have multiple audio signals coming at them, making it difficult to discern certain radio calls and warnings. The 3D audio system will give pilots the ability to distinguish between signals and discern where they’re coming from.
Last year, the service said it had planned to award a sole-source contract to Terma to integrate the enhancement. The upgrade would “drastically improve the spatial, battlespace and situational awareness of the A-10C pilots,” according to a request for information (RFI) published at the time.
An A-10 Warthog prepares to take off from Al Asad Air Base to provide close air support to ground troops in Iraq.
(Photo by Master Sgt. Cecilio Ricardo)
The 3D audio technology has previously been used in the Danish F-16 Fighting Falcon Missile Warner System upgrade.
The A-10, which entered service in 1976 and has deployed to the Middle East, Europe and the Pacific, has also played an outsized role in Afghanistan and the air campaign that began in 2014 against the Islamic State of Iraq and Syria, or ISIS, helping provide close-air support for Iraqi and U.S. partner forces on the ground.
The latest news comes after the Air Force made another major investment into the aircraft, demonstrating its willingness to keep the A-10 around longer and boost its survivability in a high-threat environment.
In August 2019, officials announced that Boeing Co. was awarded a 9 million IDIQ contract to create up to 112 new A-10 wing assemblies and spare wing kits for aircraft that are slated to receive the upgrade. The program is known as the “A-10-Thunderbolt II Advanced-Wing Continuation Kit,” or “ATTACK.”
An A-10 Warthog takes off from Al Asad Air Base to provide close air support to ground troops in Iraq.
(Photo by Master Sgt. Cecilio Ricardo)
The Air Force estimates 109 A-10s still need to be re-winged following a previous id=”listicle-2641104178″.1 billion “Enhanced Wing Assembly” contract, which began in 2011 and completed this year.
The 3D audio work will be performed in the U.S. and Denmark, the Defense Department said.
The Air Force will use fiscal 2018 and 2019 funds in the amount of .3 million toward the effort; the work is scheduled to be completed by February 2024, the announcement states.
This article originally appeared on Military.com. Follow @militarydotcom on Twitter.
Released in 2013, the Origin-12 comes standard with a five-round 12-gauge magazine or an optional 30-round drum.
The design of the Origin-12 is made to greatly reduce recoil. The barrel is placed lower than the chamber and butt stock.
“In-line shotguns, when you shoot them, they climb. Pure physics will tell you about this firearm,” Fostech Outdoors executive Judd Foster said at SHOT Show 2016. “When you shoot it, it takes recoil out of it, and it punches you on target.”
According to Fostech Outdoors, there will soon be conversion kits to allow 7.62 and 5.56mm fire coming in 2018. If you’re interested in having a forward grip, check out the Origin-12 SBV. It’s an arm braced, smooth bore, 12-gauge non-NFA Firearm.
“The Fostech Origin-12 is an awesome piece of hardware. As far as I know, its is the fastest cycling shotgun in the world, ” IV8888’s Eric said.
WRITER’S NOTE: I would like to personally thank you, the community, for bringing this beauty to my attention. The inspiration for this post goes to Marc Allen from this Facebook post. Thank you very much for your support. You rock!
“Peak performance” is a term thrown around every locker room in the NFL, but achieving true excellence in any sport is a process based on a variety of factors — both physical and mental. As a result, players and coaches often debate whether an extra workout or strict adherence to a specific diet is the most important variable in achieving results on the field.
In short, achieving peak performance among a team of athletes is incredibly challenging. This year, some NFL teams are giving consideration to a new variable: trust, and they’ve turned to an unlikely ally for help — the Green Berets.
Captain Jason Van Camp (left) as a Green Beret in Iraq
U.S. Army Green Berets are some of the military’s most elite soldiers and their mission is almost always impossible. Tasked with infiltrating deep behind enemy lines, Green Berets link up with local forces and train them for battle. Instead of kicking down doors, they train indigenous forces to kick the doors down for them. They can always expect to be faced with limited resources and, even worse, limited time, but Green Berets have a special skill that’s fostered from the very first day of their training: They focus on people first and live by a principle that “humans are more important than hardware.”
This strict belief in a humans-first mentality is why some NFL Coaches are turning to former Green Beret Jason Van Camp and his team of Special Operations veterans from Mission 6 Zero, a management consulting company that combines Special Forces with Science. Over the past seven years, Jason and his Mission 6 Zero team has worked with NFL and MLB teams to improve their performance both on and off the field by focusing on trust as the foundation of team building. This is a mission that Jason and his team know very well. They’ve helped foreign allies around the world achieve peak performance in some of the most austere environments. Now, instead of working deep behind enemy lines, these Green Berets are embedded in locker rooms across the league, training players, coaches, and front office personnel.
In the process of driving Mission 6 Zero to an elite level, Jason and his team decided to create Warrior Rising, a non-profit organization that helps veterans start or accelerate their own businesses. The Minnesota Vikings (one of the NFL teams that Mission 6 Zero advises) offered to sponsor a fundraising event in Minnesota to support Warrior Rising’s vetrepreneurs. The fundraising event was attended by Vikings players and coaches and intended to be a team bonding experience focused on trust.
Trust is the cornerstone of any successful team, but there are thousands of factors that can degrade trust within organizations, including fear, communication problems, family issues, values conflicts, and more. The veterans with Warrior Rising know that a lack of trust is what can lead a convoy into an ambush — or a turnover in the Redzone — but before Jason, a former West Point football player himself, and his team can help the NFL, they start their work by listening.
This tactic is essential, especially in today’s NFL where any action, from an off-handed comment in the locker room to an overt gesture like kneeling, can have an impact that extends far beyond the playing field. Jason explained his approach to We Are The Mighty,
“Working with an NFL team is very similar to being a Green Beret in Iraq or Afghanistan – you must master the art of communication in order to succeed. Proper communication leads to trust. Trust is an amazing weapon, but before you step out into battle, you need to understand the barriers that are keeping your teammates from trusting each other.”
Once the Green Berets have an understanding of the issues facing the team, that’s when they develop a full training plan to turn up the heat — literally — by using flamethrowers. Yeah, you read that right: flamethrowers, because there’s nothing quite like using pressurized-fuel weapons to build trust among teammates.
Jason briefs the Minnesota Vikings on there next training exercise.
Jason and the Green Berets’ logic is simple – get comfortable being uncomfortable. A little shared danger, adrenaline, and communication about team issues can help burn down (sorry) the obstacles between peak performance. Jason believes that,
“Having a talented roster alone does not make you a great coach. Great coaches create an environment that allows their players’ talents to flourish.”
In preparation for the 2018 Season, Jason and his team have used their unique approach to team-building with the Minnesota Vikings. As the season starts, we’re all excited to watch how the Green Berets’ trust training will translate into touchdowns.