A South Korean truck driver leaves his truck as he waits to enter the Kaesong industrial complex in North Korea, at the South's Customs, Immigration and Quarantine (CIQ) area, just south of the demilitarised zone separating the two Koreas, in Paju, north of Seoul, April 4, 2013. North Korea closed access to a joint factory zone with South Korea on Wednesday, officials said, putting at risk $2 billion a year in trade that is vital for an impoverished state with a huge army, nuclear ambitions and a hungry population. REUTERS/Kim Hong-Ji (SOUTH KOREA - Tags: BUSINESS INDUSTRIAL POLITICS)