North Korea began dismantling key facilities at a missile engine testing site in the country's northwest, a U.S. research group said Monday in an analysis based on new satellite imagery.The activity at the Sohae Satellite Launching Station in Tongchang-ri would, if confirmed, mark a first step toward fulfilling a promise North Korean leader Kim Jong Un made to U.S. President Donald Trump during their summit last month.According to 38 North, the group that monitors North Korea, images taken from Friday showed work has been carried out at a building where space launch vehicles are assembled a…READ FULL ARTICLE