Topic summary
SR-71
Extracted from the Wikipedia article Lockheed SR-71 Blackbird.
Designation as SR-71
In 1968, Secretary of Defense Robert McNamara canceled the F-12 interceptor program. The specialized tooling used to manufacture both the YF-12 and the SR-71 was also ordered destroyed. Production of the SR-71 totaled 32 aircraft: 29 SR-71As, 2 SR-71Bs, and 1 SR-71C.