1st Lt. Stefanie Callen, 433rd Aeromedical Evacuation Squadron flight nurse, performs compressions on a patient during a training scenario aboard a C-5 Galaxy aircraft Oct. 7, 2015 at Joint Base San Antonio-Lackland, Texas. Configuring a C-5 to meet their needs, the 433rd AES members established and met requirements to conduct Aeromedical Readiness Missions while maintaining the focus on the patient, significantly improving the efficiency and effectiveness of safe and responsive patients globally. (U.S. Air Force photo by Senior Airman Keith James/Released)