Korean vehicles heading for the inter-Korean industrial complex in Kaesong, a border city in the Democratic People's Republic of Korea (DPRK), pass through an immigration office at the Customs, Immigration and Quarantine (CIQ) in Paju, Gyeonggi province of South Korea, April 1, 2013. The South Korean government said last Saturday that it will not change the policy of keeping the Kaesong Industrial Complex open. DPRK has threatened to shut down the joint Kaesong industrial park with South Korea if the latter continued to insult its dignity, according to DPRK's official KCNA news agency. (Xinhua/Park Jin-hee)

South Korean vehicles heading for the inter-Korean industrial complex in Kaesong, a border city in the Democratic People's Republic of Korea (DPRK), pass through an immigration office at the Customs, Immigration and Quarantine (CIQ) in Paju, Gyeonggi province of South Korea, April 1, 2013. The South Korean government said last Saturday that it will not change the policy of keeping the Kaesong Industrial Complex open. DPRK has threatened to shut down the joint Kaesong industrial park with South Korea if the latter continued to insult its dignity, according to DPRK's official KCNA news agency. (Xinhua/Park Jin-hee)