Maj. John Richardson, right, 27th Special Operations Support Squadron physician, practices medical care on a simulated patient during exercise Emerald Warrior/Trident at Naval Air Station North Island, Calif., January 16, 2019. Emerald Warrior/Trident is the largest joint special operations exercise where U.S. Special Operations Command forces train to respond to various threats across the spectrum of conflict. (U.S. Air Force photo by Staff Sgt. Erin Piazza)