Will a SR-21 Son of Blackbird plane be confirmed in test flights by the USA by the end of 2028?
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https://en.wikipedia.org/wiki/Lockheed_Martin_SR-72
The Lockheed Martin SR-72, commonly referred to as "Son of Blackbird,"[1] is an American hypersonic concept intended for intelligence, surveillance, and reconnaissance (ISR). It was proposed privately in 2013 by Lockheed Martin as a successor to the retired Lockheed SR-71 Blackbird. As of 2025, no confirmed flight tests have occurred and the SR‑72 remains a design concept with speculation persisting about potential service entry in the 2030s.[2]
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