Tensions Running High Between Koreas as South Continues Military Drills

Dec. 23, 2010: South Korean Army's K-9 self-propelled guns fire live rounds during the largest joint air and ground military exercises on the Seungjin Fire Training Field in mountainous Pocheon, 20 miles from the Koreas' heavily fortified border. (AP2010)

Dec. 23, 2010: South Korean Army's Multiple rocket launchers fire live rounds during the largest joint air and ground military exercises of the year on the Seungjin Fire Training Field in mountainous Pocheon, 20 miles from the Koreas' heavily fortified border. (AP2010)

Dec. 23, 2010: South Korea K-1 tanks fire live rounds during the largest joint air and ground military exercises on the Seungjin Fire Training Field in mountainous Pocheon, 20 miles the border. (AP2010)

Dec. 23, 2010: Two F-15K fighter jets drop bombs on a mountain target during the largest joint air and ground military exercises of the year. (AP2010)

Dec. 23, 2010: South Korean President Lee Myung-bak visits the South Korean Army soldiers at a military base near the demilitarized zone (DMZ) that separates the two Koreas since the Korean War, in Yanggu, north of Seoul, South Korea. (AP2010)

Dec. 23, 2010: South Korean teenagers run amongst antiquated military hardware on display at the Korea War Memorial Museum in Seoul, South Korea. (AP2010)