/https://tf-cmsv2-smithsonianmag-media.s3.amazonaws.com/filer_public/89/1e/891e92d0-6728-47c3-b935-f279f604f40c/gettyimages-1962575656_web.jpg?#)
Boom Supersonic's XB-1 jet breaks sound barrier 3 times on final test flight (video, photos)
Boom Supersonic's XB-1 pathfinder vehicle went out in style on Monday (Feb. 10), breaking the sound barrier three times on its 13th and final test flight.
Boom Supersonic's XB-1 pathfinder vehicle went out in style on Monday (Feb. 10), breaking the sound barrier three times on its 13th and final test flight.
