And the test also the culmination of years of work for Boom, which began operations in 2014 and, against much industry skepticism, has become the first U.S. independent company to join the ...

Boom Supersonic's XB-1 demonstrator jet became the first U.S.-made civilian supersonic jet to break the sound barrier. The independently funded XB-1 reached a speed of Mach 1.122, or about 750 mph ...

Boom, 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. The company’s XB-1 ...