James Kim

A missile is carried by a military vehicle during a parade to commemorate the 60th anniversary of the signing of a truce in the 1950-1953 Korean War, at Kim Il-sung Square in Pyongyang July 27, 2013. REUTERS/Jason Lee (NORTH KOREA - Tags: POLITICS MILITARY ANNIVERSARY)

What You Need To Know About North Korea's Nuclear Program

Since the ascension of Kim Jong Un as North Korea's leader in 2011, the country has posed an ongoing diplomatic challenge for the United States. Pyongyang has ramped up work on its nuclear program and...