U.S. Air Force and international partners move toward an objective during a personnel recovery mission at Angel Thunder 17 at Gila Bend, Ariz., May 13, 2017. Angel Thunder is a two-week, Air Combat Command-sponsored, joint certified and accredited personnel recovery exercise focused on search and rescue. The exercise is designed to provide training for personnel recovery assets using a variety of scenarios to simulate deployment conditions and contingencies. Photo altered due to security concerns. (U.S. Air Force photo by Staff Sgt. Corey Hook)