U.S. Air Force Senior Airman Chaleah Phillips, 1st Maintenance Squadron aircraft armament systems journeyman, explains the Gatling gun display to Sam Kim, defense contractor, at the 100-year Gala celebration at the Hampton Roads Convention Center in Hampton, Va., Sept. 17, 2016. Langley Air Force Base is the oldest continuously operating active air base in the U.S. (U.S. Air Force photo by Airman 1st Class Derek Seifert)