JOINT BASE ANDREWS, Md. -- Joint Base Andrews Defenders competed against one another for one of four spots to represent the Air Force District of Washington in the Defender Challenge 2018 at Camp Bullis, San Antonio, Texas. The event 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. It will be the first time the competition will be held since 2003.