ELLSWORTH AIR FORCE BASE, S.D. – Airman 1st Class Julie Kemps, 28th Medical Operations Squadron flight medicine technician, performs a buddy check on Airman 1st Class John Henry, 28th Medical Operations Squadron ambulance services technician, during a phase II operational readiness exercise, July 21. After donning mission-oriented protective posture gear, Airmen perform buddy checks on each other to ensure the gear is being worn properly. (U.S. Air Force photo/Airman 1st Class Corey Hook)