Lockheed YF-12A > National Museum of the United States Air Force™ > Display

The YF-12 was developed in the 1960s as a high-altitude, Mach 3 interceptor to defend against supersonic bombers. Based on the A-12 reconnaissance aircraft, the YF-12A became the forerunner of the

Lockheed YF-12A > National Museum of the United States Air Force™ > Display

North American XB-70 Valkyrie > National Museum of the United States Air Force™ > Display

Detailed tour around the Lockheed YF-12! The fighter version of the SR-71 Blackbird.

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Lockheed YF-12, National Aeronautics and Space Administration Wiki

Lockheed YF-12A > National Museum of the United States Air Force™ > Display

Lockheed YF-12 - Wikipedia

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F 80c hi-res stock photography and images - Alamy

Lockheed YF-12A > National Museum of the United States Air Force™ > Display