FILE PHOTO: A barbed-wire fence separating North Korea from China is seen in this photo taken from the Chinese border city of Hunchun, China, March 18, 2015. Picture taken on March 18, 2015. REUTERS/Staff/File Photo
FILE PHOTO: A barbed-wire fence separating North Korea from China is seen in this photo taken from the Chinese border city of Hunchun, China, March 18, 2015. Picture taken on March 18, 2015. REUTERS/Staff/File Photo