This is why the US military gave GPS away for free
One of the most ever-present devices in modern times is the navigation system in everything from cell phones and wrist watches to in-dash car displays. All of them are made possible with just a few constellations of satellites, most of them launched by the U.S.
But the systems use the satellite signals for free despite a cost in the billions to create and launch the satellites, and $2 million is spent daily to maintain the U.S. system. So why are civilians across the world allowed to use them for free?
The big turning point was in 1983 when a Korean Air passenger jet flying near the Soviet border accidentally crossed into Russian territory in the Kamchatka Peninsula.
The Russians were worried that the plane was a U.S. bomber or spy plane, and made the catastrophic decision to attack the jet, downing it and killing all 269 passengers and crew members on board.
American officials later admitted privately that the error was an easy one to make and that the passenger jet was — probably accidentally — traveling on almost the exact same route that a U.S. spy plane was flying at the same time.
President Ronald Reagan publicly condemned the attacks and turned to his advisors to find a way to prevent other mix-ups in the future. He opened the GPS signals to public use with an executive order — but added scrambling to reduce accuracy.
This made the signals less valuable to rival militaries.
Civilian companies sprang up around GPS and worked to create devices that were perfectly accurate despite the scrambling. After almost a decade of the military increasing scrambling to foil technological workarounds, President Bill Clinton ordered that the scrambling come to an end.
Instead, the U.S. jams GPS signals locally when they’re in combat with a force that uses them.
This jamming works by interrupting the signals, allowing the U.S. to scramble signals from its own satellites as well as those launched in more recent years by Russia, China, India, and Japan.
This is how missing or captured troops get promoted
According to the Department of Defense, prisoners of war and those under missing status continue to be considered for promotion along with their contemporaries.
6 reasons Charleston might be America's most gung-ho military city
From Charles Towne Landing to the Medal of Honor Museum, go grab a pint where George Washington drank and read about the military legacy of South Carolina's Atlantic jewel.
This is how long South Korea thinks it will take to conquer the North
South Korea says they are developing new plans to defend against advancing North Korean threats after a data breach left their outdated plans vulnerable.
This stunning video shows how well 100-year-old ammo works today
While original 1911 pistols surely still function today, turns out so does the ammo from that era.
This could be the Army's next rifle — and it's totally awesome
Textron debuted its newest rifle, the Intermediate Case-Telescoped Carbine, at AUSA. It's lighter and more deadly than the current M4.
16 jokes Germans could die for telling under the Nazi regime
The Nazi Party was well short of a majority when it came to power. So it's easy to believe that not everyone was a big fan of Hitler or his ideas.
These really smart people say bigger is better when it comes to building aircraft carriers
In an effort to reduce its fiscal footprint, the Navy is looking at making smaller ships. But these defense researchers say it's a terrible idea.
Now that ISIS is on the ropes, these guys have turned the guns on each other
Two US allies, which were armed and trained by US forces, have turned their weapons on each other, and there isn't much the US can do about it.
This is the definitive history of the world's most advanced fighter jet
The new F-22A Raptor fighter jet is the most advance fighter jet in the world, and it dominates on every level imaginable.