America’s Fastest Spy Plane May Be Back—and Hypersonic

For years, Lockheed Martin Corp. has been developing a successor to one of the fastest aircraft the world has seen, the SR-71 Blackbird, the Cold War reconnaissance craft that the U.S. Air Force retired almost three decades ago. Lockheed officials have said the hypersonic SR-72—dubbed the “Son of Blackbird” by one trade journal—could fly by 2030.

But a rather curious talk last week at an aerospace conference by a Lockheed Skunk Works executive implied that the SR-72 might already exist. Referring to detailed specifics of company design and manufacturing, Jack O’Banion, a Lockheed vice president, said a “digital transformation” arising from recent computing capabilities and design tools had made hypersonic development possible. Then—assuming O’Banion chose his verb tense purposely—came the surprise.