The U.S. and South Korea have launched an annual joint military exercise, with a muted response from North Korea.
US and South Korea Hold Joint Military Exercise
1
South Korean army soldiers take part in a South Korea-U.S. joint military exercise at a subway station in Seoul, August 20, 2013.
2
People take shelter from a mock gas attack during a South Korea-U.S. joint military exercise at a subway station in Seoul, August 20, 2013.
3
South Korean army soldiers pass by ticket gates during a South Korea-U.S. joint military exercise at a subway station in Seoul, August 19, 2013.
4
Students walk past South Korean soldiers wearing gas masks during an anti-terror drill at a subway station in Seoul during joint South Korean-U.S. military drills, August 19, 2013.