Senior Airman Aaron Legardye, 11th Security Forces Squadron response force member, lifts a weighted ammunition crate during the 11th SFS Defender’s Challenge on Joint Base Andrews, Md., Oct. 3, 2018. The challenge included a fitness combat course used by Marines to test physical fitness and ability to process and execute commands under stress. (U.S. Air Force photo by Airman 1st Class Michael S. Murphy)