South Korea said Tuesday that its troops fired warning shots on the weekend after soldiers from North Korea briefly crossed the countries' border.According to South Korea's Joint Chiefs of Staff, about 20 North Korean soldiers crossed the Military Demarcation Line in the Demilitarized Zone separating the two Koreas at around 12:30 p.m. Sunday and returned after warnings were broadcast and shots were fired in the air by the South Korean side."Given that (the North Korean soldiers) immediately returned after our warning shots, it seems that they did not intend to cross the border," JCS spokes…READ FULL ARTICLE