U.S. Air Force and Air Force Reserve medical personnel load simulated patients from an ambulance bus onto a C-17 Globemaster III during exercise Ultimate Caduceus 2018 at Travis Air Force Base, Calif., Aug. 23, 2018. Ultimate Caduceus is an annual patient movement exercise designed to test the ability of U.S. Transportation Command to provide medical evacuation. (U.S. Air Force photo by Jamal D. Sutter)