KAESONG, NORTH KOREA - DECEMBER 19:  North Korean employees work at the assembly line of the factory of South Korean company at the Kaesong industrial complex on December 19, 2013 in Kaesong, North Korea. North Korea agreed on this rare cross-border trip of about 30 foreign officials and financial experts proposed by South Korea as the South Korean government watches on Pyongyang following the execution of leader Kim Jong-Un's uncle, Jang Song-Thaek. The Kaesong Industrial Complex was re-opened in September after a five-month closure caused by military tensions.  (Photo by Park Jin-Hee-Pool/Getty Images)