ARLINGTON NATIONAL CEMETERY, Va. -- Susan Zerbe is presented a flag by Lt. Gen Eric Fiel, commander of Air Force Special Operations Command, during a funeral ceremony for her son, Tech. Sgt. Daniel B. Zerbe, here Aug. 23, 2011. Zerbe was killed when a CH-47 Chinook carrying troops, crashed in the Wardak Province in eastern Afghanistan. (U.S. Air Force photo/Staff Sgt. Tiffany Trojca)