No submission: Yokota’s Endurance jiu-jitsu class
Staff Sgt. Ryan Underwood, 374th Communications Squadro, tries to pass the guard of his opponent, Senior Airman Vonfernan Carios, 374th Aerospace Medicine Squadron, during an jiu-jitsu class sparing session at Yokota Air Base, Japan, June 10, 2015. Sparing helps students improve muscle-memory and build fighting endurance. (U.S. Air Force photos by Airman 1st Class Elizabeth Baker/Released)