Retired Air National Guard Chief Warrant Officer 2 Robert Hertel looks at a P-47 Thunderbolt for one of the first times since the 1960's during the Heritage Flight Training and Certification Course at Davis-Monthan Air Force Base, Ariz., Feb. 28, 2015. Hertel flew the Thunderbolt over Iwo Jima, Japan during World War II. (U.S. Air Force photo by Senior Airman Jensen Stidham/Released)