U.S. Air Force Master Sgt. Diego Santos, 156th Aeromedical Evacuation, holds up a scenario card ‘door warning light’ prompting the crew to initiate an emergency checklist during an aeromedical training mission roundtrip from North Carolina Air National Guard Base, Charlotte Douglas Intl. Airport, Jan. 9, 2015. As the mission clinical coordinator, Santos provided the crew with scenarios to test their response to aircraft emergencies and medical issues. (U.S. Air National Guard photo by Staff Sgt. Julianne M. Showalter, 145th Public Affairs/ Released)