Have you ever watched a superhero movie where the protagonist had the gift of superspeed and could travel at the speed of sound? Because of NASA, flying at the speed of sound, about a mile in 4.69 ...
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.