U.S. Army Spc. Micah Roberts uses a portable explosion detector to examine clothes found in a barn during a search for weapons caches, in Parwan province, Afghanistan, May 10, 2011. Roberts is a cavalry scout with Bravo Troop, 1st Squadron, 113th Cavalry Regiment, Task Force Redhorse, 2nd Brigade Combat Team, 34th Infantry Division, Task Force Red Bulls.