Ah-64d Apache Longbow helicopters perform medical evacuations for the medical tent on the drop zone of Joint Operational Access Exercise (JOAX), Fort Polk, L.A., Oct. 11,2012. JOAX is a two-week exercise to prepare Air Force and Army service members to respond to worldwide crisis and contingencies. (U.S. Air Force Photo by Airman 1st Class Logan Brandt/Released)