Multiple emergency crews, including the Louisville Metro Police Department, responded to the crash site around 5 p.m., where authorities warned there was “fire and debris.”

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.

Initial flying qualities and air data performance were verified during the X-59’s flight, which will be expanded over the coming months.

NASA’s sleek and quiet supersonic X-59 jet — which is built to reach speeds of up to 925 mph — soared across the California desert in its first test flight on Tuesday, bringing speedy global