5 of 37: U.S. Marine Cpl. Abraham Willis, 22, of Beech Bottom, W. Va., with the 2nd Battalion 12th Marines based in Kaneohe Bay, Hawaii, and his IED detection dog Preacher ride in the back of a wagon as they are shuttled over a bridge for a foot patrol at sunrise in Kajaki, Helmand province, Afghanistan, Friday, July 29, 2011. (AP Photo/David Goldman) (AP Photo/ David Goldman)

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