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South Korean soldiers demonstrate their skills during an anti-terror drills ahead of the 4th Asian Indoor and Martial Arts Games Incheon, which starts from the end of June, in Incheon, west of Seoul, South Korea, Thursday, June 13, 2013. The drills was held against possible terrorists' attack while the threat of terrorism in various sports games are increasing after Boston Marathon terror.

Lee Jin-man/AP

South Korean soldiers participate in an anti-terror drill ahead of the 4th Asian Indoor and Martial Arts Games, which starts from the end of June, in Incheon, west of Seoul, South Korea. The drills were held against possible terrorist attacks following the Boston Marathon bombings.