For years, Lockheed Martin Corp. has been developing a successor to one of the fastest aircraft the world has ever 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.
No comments:
Post a Comment