U.S. Army Cpl. Casey Leimbach and U.S. Army Spc. Timothy Rigg provide security during a patrol to Black Rock in Afghanistan's Khost province, July 31, 2012. Leimbach and Rigg are assigned to 25th Infantry Division's Company A, 1st Battalion, 501st Infantry Regiment, 4th Brigade Combat Team. Their unit conducted the patrol to investigate an attack to Combat Outpost Bak.