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A U.S. service member salutes her fallen comrades during a memorial ceremony for six Airmen killed in a suicide attack, at Bagram Air Field, Afghanistan on Wednesday, Dec. 23, 2015. The deadliest attack in Afghanistan since 2013 killed six U.S. troops on Monday, including a family man from Long Island, New York; a South Texan; a New York City police detective; a Georgia high school and college athlete; an expectant father from Philadelphia; and a major from suburban Minneapolis with ties to the military's LGBT community. They were killed when their patrol was attacked by a suicide bomber on a motorcycle near Bagram Air Base, the Defense Department said. (Tech. Sgt. Robert Cloys/U.S. Air Force via AP)