First Lt. Robert Hoover, a U.S. Air Force fighter and test pilot, poses for a photo with other North American test pilots. Hoover was selected as the Class of 2020's Exemplar. Known as a "pilot's pilot," Hoover revolutionized modern aerobatic flying. (Courtesy photo)

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Photo by: Courtesy Photo  |  VIRIN: 171013-F-RB000-001.JPG