The X-31 was powered by a single General Electric F404-GE-400 afterburning turbofan engine developing 16,000 pounds of thrust. Its maximum speed was 901 miles per hour, which is approximately Mach ...

And mishaps can be deadly. A missile launched in 2019 crashed and eventually exploded during a recovery attempt, killing seven people, according to U.S. officials. ... On Aug. 31, the Russian ...