Capt. Christopher Ng, 51st Medical Operations Squadron general surgeon, left, and Tech. Sgt. Joshua Crook, 51st MDOS noncommissioned officer in charge of Ambulance Services, right, treat a simulated patient in a care-under-fire scenario during a two-day Tactical Combat Casualty Care training course on Sept. 25, 2019, at Osan Air Base, Republic of Korea. During the course, medics had to learn how to shoot, move and communicate while treating patients in a hostile environment. (U.S. Air Force photo by Tech. Sgt. Matt Davis)