Description:North Korea's Worker-Peasant Red Guards conduct a military drill. The civil defence force group, numbering around 5.7 million, held the exercise against a background of rising hostilities on the Korean peninsula. South Korean and U.S. troops took part in the joint computer-simulated drill "Key Resolve" on Friday in Seoul. The annual joint drills started on Monday to practice combined and joint command-post military operations to defend South Korea.(1:14)