Master Sgt. Rachael Hall, 22nd Force Support Squadron Airman Leadership School commandant, completes memorial push-ups after a volleyball game, Jan. 19, 2016, at McConnell Air Force Base, Kan. After every physical training session, ALS students and instructors perform push-ups to remember Airmen that have died in the line of duty. (U.S. Air Force photo/Senior Airman David Bernal Del Agua)