U.S. Air Force Staff Sgt. Brent Olson, a military dog handler and Blek, a military working dog, clear caves during a mission with U.S. Army Soldiers from Charlie Company, 3rd Battalion, 187th Infantry Regiment, 3rd Brigade, 101st Airborne Division, in the Zirat Mountain Area, Waza Kwah District, Paktika province, Afghanistan, July 7. The purpose of the mission is to disrupt anti-Afghan forces and find enemy caches.