This biplane could be one of the deadliest North Korean weapons

While much of the world's attention is focused on the effort by North Korea to develop intercontinental ballistic missiles (ICBMs) with working nuclear warheads, there is another weapon that is also quite deadly in the arsenal of Kim Jong Un's regime. Ironically, it is quite low-tech.

That weapon is the An-2 Colt, a seventy-year-old design that is still in front-line service, which means it has the B-52 Stratofortress beaten by about eight years! So, why has this little plane stuck around, and what makes it so deadly in the hands of Kim Jong Un?

According to MilitaryFactory.com, the An-2 has a top speed of 160 miles per hour, and a range of 525 miles. Not a lot when you compare it to the B-52, which can go 595 miles per hour and fly over 10,000 miles. China is still producing the plane, while upgrade kits are being developed by Antonov. The plane was in production for 45 years, and according to the report from Korrespondent, thousands remain in service.

When it comes down to it, what seem like fatal weaknesses actually make the An-2 deadly in modern combat.

The reason? The plane usually flies low and slow – and as such, it is very hard for modern fighters like the F-22, F-35, and F-16 to locate, track, and fire on. Not only that, the slow speeds and low-altitude operations meant that large portions of the plane can be covered with fabric, according to Warbird Alley. There are also a lot of An-2s in North Korea's inventory – at least 200, according to a report by MSN.com.

While the plane is often used to deliver troops or supplies, the real threat may be the fact that it could carry some other cargo. While North Korea is just now developing nuclear warheads that fit on missiles, there is the frightening possibility that a nuclear weapon could be delivered using an An-2.

That is how this 70-year-old biplane design could very well be North Korea's deadliest weapon. You can see a video on the An-2 below.