The Lockheed Martin SR-72, colloquially referred to as "Son of ...
wikipedia - 08 Jun 2022The Lockheed Martin SR-72, colloquially referred to as "Son of Blackbird",[1] is an American hypersonic UAV concept intended for intelligence, surveillance and reconnaissance proposed privately in 2013 by Lockheed Martin as a successor to the retired Lockheed SR-71 Blackbird. The company expected that an SR-72 test vehicle could fly by 2025.