English: The Lockheed A-12 "Oxcart" was a reconnaissance aircraft built for the US Central Intelligence Agency by Lockheed. The highly-secret A-12 Oxcart led to the SR-71 "Blackbird".
A-12 in flight. This aircraft was later lost over South China Sea on June 6, 1968
A-12 trainer. The California Science Center is in background.
A-12 wind tunnel test models. One with canards and the final configuration.