A flight nurse from REACH Air Medical Services explains the gear inside a helicopter to Staff Sgt. Katrina Thelen, 489th Reconnaissance Squadron medical technician, during an exercise at Beale Air Force Base, Calif., April 2, 2014. The exercise was conducted for Airmen to gain proficiency loading patients onto emergency helicopters. (U.S. Air Force photo by Airman 1st Class Bobby Cummings/Released)