Lt. Col. Matthew Simmons, 80th Flying Training Wing U.S. senior national representative at Sheppard Air Force Base, Texas, holds a piece of debris from his first missile strike during a training mission, Dec. 11, 2017. Simmons used that shrapnel to illustrate the importance of aircraft armament systems Airmen. (U.S. Air Force photo by Staff Sgt. Kyle E. Gese)