Staff Sgt. Brad Wiebelhaus, 9th Aircraft Maintenance Squadron avionics technician, performs a pre-flight inspection of a U-2 Dragon Lady at Joint Base Elmendorf-Richardson, Alaska, May 8, 2017. The joint training exercise focused on interoperability and hosting approximately 6,000 service members, 200 fixed-wing aircraft and provides the Army, Navy, Air Force, Marines and Coast Guard with critical training. (U.S. Air Force photo/Staff Sgt. Jeffrey Schultze)

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Photo by: Staff Sgt. Jeffrey M. Schultze |  VIRIN: 170508-F-GU448-008.JPG