U.S. and South Korea Marines rappel down during the mountain warfare training for the joint U.S.-South Korean military exercises Key Resolve/Foal Eagle (KR/FE) 2010 in Pohang, South Korea on March 9. North Korea's army said Monday it is ready to "blow up" South Korea and the U.S., hours after the allies kicked off annual military drills that Pyongyang has denounced as a rehearsal for attack. (AP Photo/Ahn Young-joon)
