Summary: The Lockheed YF-12, developed in the late 1950s and early 1960s, was a groundbreaking interceptor designed to counter Soviet bombers during the Cold War. -Capable of reaching speeds of Mach 3 ...

Here’s What You Need to Remember: The last remaining YF-12 saw continued use, however, in joint supersonic cruise testing between NASA and the U.S. Air Force, until it was ultimately retired to the ...