A US M1A2 SEP Abrams battle tank fires live rounds during a joint military exercise between South Korea and the US at the US Army's Rodriguez Live Firing Range in Pocheon, about 46 km northeast of Seoul and about 15 km south of the demilitarized zone separating the two Koreas, on September 1, 2011.

A US M1A2 SEP Abrams battle tank fires live rounds during a joint military exercise between South Korea and the US at the US Army's Rodriguez Live Firing Range in Pocheon, about 46 km northeast of Seoul and about 15 km south of the demilitarized zone separating the two Koreas, on September 1, 2011. The Korean peninsula is the world's last Cold War frontier as Stalinst North Korea and pro-Western South Korea have been technically at war since the 1950-53.

Smoke bombs explode near a U.S. M1A2 SEP Abrams battle tank during a joint military exercise between South Korea and the United States at Rodriguez Range in Pocheon, south of the demilitarized zone that divides the two Koreas, South Korea, Thursday, Sept. 1, 2011.