Concorde didn&#x27;t fail because there wasn&#x27;t a market for fast travel between cities like London and New York. British Airways had no trouble filling them (at super-premium prices), and it&#x27;s Concorde operations were quite profitable.<p>The real problem was that there was no market for expensive planes that couldn&#x27;t operate over land routes, or from many airports, because of the extreme noise and environmental concerns.<p>If supersonic passenger planes are ever going to be a reality again then these are the things that need to be addressed, and thankfully it seems NASA realises this.