Senior Airman Jan-Michael Wampler, an A-10 Thundebolt II crew chief from the 355th Aircraft Maintenance Squadron, briefs Chief Master Sgt. of the Air Force James A. Roy Jan. 12, 2011, during the chief's visit to Davis-Monthan Air Force Base, Ariz. Airman Wampler explains the duties and challenges crew chiefs face on a daily basis. (U.S. Air Force photo/Airman 1st Class Jerilyn Quintanilla)