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

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

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Lockheed YF-12 - Wikipedia

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Lockheed YF-12A This Day in Aviation

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Lockheed SR-71A > National Museum of the United States Air Force

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

Lockheed SR-71A > National Museum of the United States Air Force

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Lockheed YF-12A and the North American XB-70 Valkyrie at the

USAF Lockheed YF-12A Blackbird, Stock Photo, Picture And Rights