Senior Airman Nick Lodge, 811th Security Forces Squadron response force member, performs pushups as part of a security forces defender competition on Joint Base Andrews, Md., July 23, 2018. The defenders were competing to represent the Air Force District of Washington in the Defender Challenge 2018 at Camp Bullis, San Antonio, Texas. The defender’s challenge will give the Air Force and partnering allies such as the Royal Air Force, the German Luftwaffe, the Royal Australian Air Force and the Royal Canadian Air Force a way to showcase their military police capabilities and joint interoperability. (U.S. Air Force photo by Airman 1st Class Michael S. Murphy)