Air Force Senior Airman Jacob N. Patterson, kneeling, attaches electrocardiogram electrodes on mock cardiac arrest patient Tech. Sgt. Tyra D. Everett during an aeromedical evacuation training mission onboard a KC-135R Stratotanker over the Caribbean Sea, Aug. 27, 2017. Patterson and Everett are aeromedical evacuation technicians assigned to the 514th aeromedical evacuation squadron, 514th Air Mobility Wing. Air Force photo by Master Sgt. Mark C. Olsen