NASA's X-59 plane will try to quietly break the speed of sound in 2023
https://www.newscientist.com/article/2352105-nasas-x-59-plane-will-try-to-quietly-break-the-speed-of-sound-in-2023/?utm_campaign=RSS%7CNSNS&utm_source=NSNS&utm_medium=RSS&utm_content=home