A U.S. Air Force pararescueman and a member of the Swiss army transport a simulated casualty during a mass casualty exercise for Exercise Angel Thunder at Camp Navajo, Flagstaff, Ariz., May 9, 2014. Angel Thunder is a multilateral annual exercise that supports the DoD's training requirements for personnel recovery responsibilities through high-fidelity exercises. Angel Thunder provides the most realistic PR training environment available to USAF rescue forces as well as their joint, interagency and coalition partners. (U.S. Air Force Photo by Airman 1st Class Chris Massey/Released)