60-6940 USAF. BFI, Museum of Flight, Seattle, WA, USA. Based one the SR 71 Blackbird, two M-21 /and 20 D-21 was designed for CIA and Air Force surveillance missions. On the top of the M-21 - Mothership, the D-21 - Daughter drone was mounted. The D-21's ramjet engine propelled its speeds over 2000 mph / 3200 kmh
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