Propulsion in the Hush House
U.S. Air Force Senior Airman Shawn Hanson, a mechanic with the 169th Maintenance Squadron propulsion unit, inspects the inside of the a Pratt Whitney 229, block 52 jet engine after it was tested inside the hush house at McEntire Joint National Guard Base, S.C., March 2, 2013. Hanson ensures there are no leaks or damage before and after the engine is ran in the hush house. (National Guard photo by Staff Sgt. Jorge Intriago/Released)