The aircraft on display at the museum is the last U-2A built. During the 1960s, it made 285 flights to gather data on high-altitude, clear-air turbulence and in the 1970s it flight tested reconnaissance systems. Delivered to the museum in May 1980, it is painted as a typical reconnaissance U-2. https://www.nationalmuseum.af.mil/Visit/Museum-Exhibits/Fact-Sheets/Display/Article/195974/lockheed-u-2a/ | National Museum of the U.S. Air Force