The SR-72 Darkstar is a hypersonic UAV for intelligence gathering, using advanced technology to fly faster than previous ...
National Interest on MSN5mon
Mach 6 SR-72 Son of Blackbird Could Soon Become Very RealThe SR-72 was once publicly touted as a Mach 6+ spy ... like the D-21 supersonic ISR drone, that began as a bright idea ...
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