How high will the SR 71 spy plane fly?

The Air Force reconnaissance version was originally called the R-12 (see the opening fly page in Paul Crickmore's book SR-71, Secret Missions Exposed, which contains a copy of the original R-12 labeled plan view drawing of the vehicle). However, during the 1964 presidential campaign, Senator Barry Goldwater continually criticized President Lyndon B. Johnson and his administration for falling behind the Soviet Union in the research and development of new weapon systems. Johnson decided to counter this criticism with the public release of the highly classified A-12 program and later the existence of the reconnaissance version.