U.S. Army Staff Sgt. Larry Clapper (top) and Spc. Christopher Dodson search sewage pipes for suspicious materials during a combined cordon and search with the Iraqi army in Mansour, Iraq, on April 14, 2007. Clapper and Dodson are from Alpha Company, 1st Battalion, 23rd Infantry Regiment, 3rd Stryker Brigade Combat Team, 2nd Infantry Division.