141015-F-TJ158-449
Staff Sgt. Blake Owens, 4th Special Operations Squadron aerial gunner, watches as a 105mm cannon is fired during a training mission on board an AC-130U Spooky Gunship, Oct. 15, 2014. The prototype AC-130U made its first flight on Dec. 20, 1990. (U.S. Air Force photo/Senior Airman Christopher Callaway)