The U.S. and South Korea have launched an annual joint military exercise, with a muted response from North Korea.
ສະຫະລັດກັບເກົາຫລີໃຕ້ ຮ່ວມຊ້ອມລົບ ປະຈໍາປີ

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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.

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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.

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South Korean army soldiers put on gas masks during South Korea-U.S. joint military exercises at a subway station in Seoul, August 19, 2013.

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Protesters stage a rally against South Korea-U.S. joint military exercises in front of Yongsan U.S. Army headquarters in Seoul, August 19, 2013.