A South Korean soldier looks back as journalists talk with a officer at South Korea's CIQ (Customs, Immigration and Quarantine) office, just south of the demilitarised zone separating the two Koreas, in PajuVia Ju-min Park PAJU, South Korea (Reuters) – North Korea closed get right of entry to to a joint factory zone with South Korea on Wednesday, officials stated, hanging at risk $2 billion a year in exchange that is important for an impoverished state with a huge army, nuclear ambitions and a hungry inhabitants. The transfer marked an escalation in North Korea's months-lengthy standoff with South Korea and its ally Washington. On Tuesday, Pyongyang said it could restart a mothballed nuclear reactor, drawing criticism from the international group, including China, its main benefactor and diplomatic pal. …