But while the successful test flight of XB-1 shows that supersonic flight without sonic booms is technically feasible, the next phase is making it economically feasible. Right now, both subsonic and sonic boom-producing supersonic travel are cheaper than using this Mach cutoff method.

US aeronautics agency NASA managed to capture the Boom Supersonic XB-1 research aircraft as it broke the sound barrier during its final flight on 10 February. The flight - the XB-1's second in excess of Mach 1 - was the last in a series of test sorties by the aircraft,

On February 10, in the skies above the Mojave Desert, the Boom Supersonic XB-1 test jet roared past Mach 1, tearing through the sound barrier. But this time, there was no need to take it on faith. NASA captured the moment in a striking image,

NASA has released a new image showing the moment Boom Supersonic's XB-1 jet broke the sound barrier without producing an audible sonic boom. Boom Supersonic, the company aiming to create commercial planes that can travel faster than the speed of sound,

It is often said that a picture is worth a thousand words, and a recent photo released by NASA in conjunction with Boom Supersonic shows just how remarkable capturing a moment can be. Boom Supersonic is currently building the world’s fastest airliner,