United Airlines’ CEO Scott Kirby is known for his opinions (and there sure are a lot of them). However, this month he has made a bold claim that has broad implications for how the market sees one of the industry’s most ambitious projects. Here we speak, of course, of the Boom Overture story. This program, intending to build a supersonic passenger jet, offers huge promise and equally large execution risk. Boom has real momentum, with its XB-1 demonstrator breaking the sound barrier in 2025.