Boom Supersonic, the American company building what promises to be the world’s fastest airliner, broke the sound barrier for its first time with a test flight in Mojave, California, on Tuesday.

Boom’s XB-1 jet breaks sound barrier on first supersonic flight - Boom’s inaugural XB-1 supersonic test flight reached speeds of more than 850 miles per hour

A supersonic passenger jet dubbed the ‘New Concorde’ travelled faster than the speed of sound for the first time during a test flight today. Some 34,000ft above California’s Mojave Desert, the XB-1 prototype reached speeds of 844 miles per hour – more than the 770mph speed of sound.

Boom Supersonic’s XB-1 jet became the first independently developed aircraft to break the sound barrier in the Mojave Desert on Tuesday. The test flight marks a milestone in Boom’s effort to revive supersonic passenger travel,

An American civil aircraft broke the sound barrier for the first time in California's Mojave Desert, a US aviation company announced on Wednesday.

Boom Supersonic passed a major milestone with its first experimental flight to reach Mach 1. The speed was achieved about 11 minutes into the test.