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In a first, NASA's experimental X-59 plane flew faster than the speed of sound, setting the stage for 'quiet' supersonic aircraft

On June 5, NASA’s experimental X-59 plane went supersonic for the first time. The aircraft zoomed through the sky at a top speed of about 713 miles per hour, or Mach 1.1, and an altitude of 43,400 ...
CNN

Supersonic flight is making a comeback decades after the Concorde. But one big hurdle remains

The skies of Oklahoma City roared for six months in 1964 as military aircraft intentionally rattled the population below with a daily barrage of thunderous sonic booms. It was a controversial test — ...