U.S satellites have detected activity at a North Korean missile test site that strongly suggests another missile launch will happen any day now. At the same time a North Korean submarine has been engaged in what has been called 'unusual activity.' It is being closely watched as North Korea is developing sub launched ballistic missiles. In 2010 a North Korean submarine torpedoed a South Korean navy vessel so everyone is wondering what they are doing. North korea and Kim Jong-un are trying to gain the 3 areas of nuclear strength that would make them a recognizable force. These are being able to launch a nuke from land, sea and air. All images from the public domain. Clips from creative commons. Links below. • Video • Reza Khalili Explaining Iranian Missile Si... • Iskander and SMERCH Mobile Ballistic Mis... • Video • Video