Keywords: 130413-F-PD696-745 (8660775772).jpg U S Air Force pararescuemen rangers with the National Park Service in Arizona and local fire and rescue crews participate in a mass casualty exercise at the Grand Canyon in Arizona April 13 2013 during exercise Angel Thunder 2013 Angel Thunder is a joint service interagency and multinational combat search and rescue exercise designed to provide training for personnel recovery assets in a variety of scenarios to simulate deployment conditions and contingencies DoD photo by Staff Sgt Tim Chacon U S Air Force/Released https //www flickr com/photos/39955793 N07/8660775772/ 130413-F-PD696-745 2013-04-13 21 16 https //www flickr com/people/39955793 N07 U S Department of Defense Current Photos PD-USGov U S Department of Defense Current Photos https //flickr com/photos/39955793 N07/8660775772 2016-09-03 08 56 41 United States Government Work Military in Arizona Grand Canyon United States Department of Defense |