San Antonio paramedic firefighters, Richard Mahan and Dave McCulley, secure seatbelts on Airman Davis Schleifer, 344th Training Squadron, during a National Disaster Medical System exercise March 20, 2019 at Joint Base San Antonio-Lackland, Texas. The exercise involved multiple military branches and civilian organizations to practice their ability to handle a large influx of patients. (U.S. Air Force photo by Master Sgt. Kristian Carter)