A jet engine screams to life, shattering the stillness of a California airfield. The X-59 QueSST—99.7 feet of sleek, needle-nosed fury—quivers with raw power, then blasts forward, the ground a fleeting blur. At Mach 1.4—925 mph—it smashes the sound barrier. You brace for the sonic boom, that earth-rattling roar that killed supersonic dreams like the […]