Photo of the Day: People walk past a soldier participating in an anti-terror drill at a subway station in Seoul. South Korean and US forces began on Monday the Ulchi Freedom Guardian drill, an annual joint exercise to practice their defense ability against North Korea. About 56,000 South Korean soldiers and 30,000 US troops will attend in the computer-aided military drill. (Reuters/Kim Hong-Ji)

Photo of the Day: People walk past a soldier participating in an anti-terror drill at a subway station in Seoul.

South Korean and US forces began on Monday the Ulchi Freedom Guardian drill, an annual joint exercise to practice their defense ability against North Korea.

About 56,000 South Korean soldiers and 30,000 US troops will attend in the computer-aided military drill. (Reuters/Kim Hong-Ji)