ELLSWORTH AIR FORCE BASE, S.D. – Senior Airman Johnathan Byron, 28th Security Forces Squadron member, inspects components of his M-4 carbine before reassembly, Nov. 22. Airman Byron was the best shooter in the M9 pistol and M4 carbine combined category, Nov. 16 in the Global Strike Challenge at Barksdale Air Force Base, La. (U.S. Air Force photo/ Senior Airman Jarad A. Denton)