Senior Airman Justin Tapia, 11th Security Forces Squadron response force member, pushes through a situp during a security forces defender competition on Joint Base Andrews, Md., July 23, 2018. Tapia, along with other defenders, fought to get one of the four positions on the team going to Camp Bullis, San Antonio, Texas, to represent the Air Force District of Washington in the Defender Challenge 2018. It is the first time the competition will be held since 2003. (U.S. Air Force photo by Airman 1st Class Michael S. Murphy)