T ITS HEIGHT in the early 1970s, the Concorde was the Champagne-and-caviar incarnation of supersonic travel, and it remained so until noise and emissions restrictions sunsetted the quixotic aircraft in 2003. Two decades after the Concorde's final flight, Blake Scholl, founder and CEO of Boom Supersonic, is again extolling the potential of flying faster than the speed of sound. “Speed is not just about going fast,” he says. “It's about who we can spend
