U.S. Air Force Staff Sgt. Aaron Vanley, 633rd Security Forces Squadron base defense operations center controller, carries ammunition cans during Air Combat Command’s Defender Challenge team selection at Joint Base Langley-Eustis, Virginia, August 24, 2018. The Airmen competed to represent ACC during the 2018 Air Force Defender Challenge, which will be held at Joint Base San Antonio-Camp Bullis, Texas, from Sept. 10-13, 2018. (U.S. Air Force photo by Airman 1st Class Anthony Nin Leclerec)