NASA's X-59 supersonic-but-quiet jet soared over the Southern California desert on Tuesday in the first test flight of an experimental aircraft designed to break the sound barrier with little noise, paving the way for faster commercial air travel.

With the YFQ-44 now flying, both of the U.S. Air Force’s new Collaborative Combat Aircraft are in flight testing. The YFQ-44A Collaborative Combat

Lockheed Martin's revolutionary X-59 supersonic jet completes first test flight, designed to break sound barrier with quiet 'thump' instead of sonic boom.

After General Atomics announced their successful first flight in late August, Anduril executives said in September that they wanted to make its first drone wingman flight test semi-autonomous, and blamed the delay on software problems.

Anduril emphasized the semiautonomous piloting of its YFQ-44A collaborative combat aircraft in its first flight test.