Staff Sgt. Lewis Thomas, 11th Civil Engineer Squadron water and fuels systems specialist, checks a pressure gauge at Hangar 13 on Joint Base Andrews, Md., Aug. 19, 2015. Thomas and his crew were repairing the facilities fire suppression system, which is crucial for hangars that store aircraft. (U.S. Air Force photo by Staff Sgt. Chad C. Strohmeyer)(Released)