U.S. Air Force Senior Airman Derek Seifert, 633rd Air Base Wing photojournalist, performs a pull-up during a Memorial Day Murph and Pararescue Workout event at Joint Base Langley-Eustis, Va., May 29, 2017. Throughout the Murph Workout, participants ran a total of two miles, performed a total of 100 pullups, 200 pushups and 300 squats. (U.S. Air Force photo/Staff Sgt. Areca T. Bell)