NASA's X-59 jet broke the sound barrier for the first time on Friday (June 5), reaching a top speed of about Mach 1.1.

Going supersonic! NASA's X-59 jet breaks sound barrier for the 1st time

Source: space
Source Link: https://www.space.com/technology/aerospace/going-supersonic-nasas-x-59-jet-breaks-sound-barrier-for-the-1st-time