Staying with the NorthIt appears as though Pyongyang is ready to conduct a fourth nuclear test.During a questioning session in parliament on Monday, South Korean Defense Minister Kim Kwan-jin told lawmakers that preparations for a test at North Korea's main underground nuclear site in Punggye-ri appear to be complete.The site was used for the regime's third nuclear test last year.Kim also noted the North is in the early stages of preparing for a long-range missile test at its northwest launching site in Tongchang-ri .He assured the South Korean military is keeping a close watch on movements there.