Airman 1st Class Peter Xiong, 28th Aircraft Maintenance Squadron crew chief, uses a sump draining tool to draw fuel from a fuel sump on a B-1 bomber at Ellsworth Air Force Base, S.D., Oct. 24, 2013. Crew chiefs perform this inspection to determine if there is debris or other contaminants in the fuel sump, items that could cause tremendous damage to the aircraft if not remedied. (U.S. Air Force photo by Airman 1st Class Alystria Maurer/Released)