Tech. Sgt. Matthew Cain, 459th Aircraft Maintenance Squadron crew chief, starts a generator prior to completing pre-flight inspections on a KC-135 Stratotanker at Joint Base Andrews, Md., March 25, 2013. Personnel continue flightline operations despite a spring snowstorm forecasted to bring up to five inches of snow to the area. (U.S. Air Force photo/Staff Sgt. Nichelle Anderson)