N.Korea dares US with new nuclear warheads; Kim is ramping nuke production|Watch

In a response to U.S. aircraft carrier arriving in South Korea, the North unveiled new, smaller nuclear warheads and vowed to 'exponentially' increase production of nuclear weapons. The North Korean state media released photos of Kim Jong Un inspecting the new warheads and latest technology for mounting those warheads on ballistic missiles. North Korea's latest threat came as the United States docked USS Nimitz, one of the largest warships in the world, at Busan after joint military drills with South Korea. Watch this video for details.