Report: N. Korea replaces border guards following defection

North Korea appears to have replaced all of its guards at a jointly patrolled border area where a North Korean soldier defected last week under a hail of gunfire, according to South Korean media. Military officials said Friday they could not confirm the report.Yonhap news agency cited an unnamed intelligence source saying there were "signs" the North had replaced its entire security force of 35 to 40 men at the Joint Security Area. South Korea's Defense Ministry and the U.S.-led United Nations C