YOKOTA AIR BASE, Japan -- 1st Lt Sean Abling, 459th Airlift Squadron, preforms a preflight check on a UH-1 Iroquois helicopter on Yokota, March 23, 2011. The helicopters are critical in providing logistical support by transporting general officers, Department of Energy personnel and other officials in support of Operation Tomodachi. (U.S. Air Force photo/Master Sgt. Jeromy K. Cross/released)