(CBS News) -- North Korea moved a missile to its east coast Thursday, possibly putting its neighbors -- but not the United States -- within range. Satellite photos show new activity at a North Korean nuclear reactor used to make fuel for bombs. North Korean leader Kim Jong Un. / CBS News It was another day of belligerent threats from a new dictator who may be as young as 29. Kim Jong Un says he is ready to attack the U.S. According to a psychological profile put together by U.S. intelligence, Kim Jong Un may feel compelled to prove just how tough he is to make up for his inexperience. The two previous North Korean dictators were Kim Jong Un's grandfather, Kim Il Sung, a hard core revolutionary, and his father, Kim Jong Il, who ruled for 17 years. Kim Jong Il, leader of North Korea from 1994 to 2011. / CBS News But unlike them, Kim Jong Un knows nothing about hardship and power struggles. One of the CIA's former top experts on North Korea, Joseph DeTrani, described Kim...