North Korea started to develop a nuclear weapons program in 1962 with the help of the Soviet Union. On October 9, 2006 it conducted its first nuclear test underground. Since the start of its nuclear weapons programs, North Korea has always gone back and forth on whether it will continue developing its nuclear weapons. The country has signed agreements stating it will stop its nuclear weapon program, and then didn’t comply with the agreement it signed.  It is very important for the international community to monitor North Korea’s nuclear weapon program. Using remote sensing to produce satellite imagery that experts can analyze has become an essential part of monitoring North Korea’s nuclear weapon program.