The Lockheed A-12 Archangel was the first of Kelley Johnson's supersonic reconnaissance planes based on the same airframe. Here is a look at the technologies developed to make the aircraft possible.
Convair's YB-60 strategic bomber was a redesign of the B-36 Peacemaker. The main changes were jet engines and swept back wings. Ultimately the US Air Force chose the smaller but faster B-52 Stratofortress as their plane for the future.
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