The Air Force has long debated how to conduct penetrating intelligence, surveillance and reconnaissance missions since the venerable, high-speed SR-71 retired in 1998. But despite the need and a lingering requirement, no visible progress toward that goal was made. That’s because the highly classified aircraft – the RQ-180 – has been developed by Northrop Grumman in secret. In the Dec. 9, 2013 issue of Aviation Week & Space Technology, Senior Pentagon ...
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