An awesome machine to watch. Saw one takeoff at Washington-Dulles airport - potery in motion.
Also flew from Honolulu to Sydney once in a B707, when we knew the Concorde was due to follow us on the same track about half an hour later. I will never forget looking out the window and watching the Concorde pass us like we were standing still!
I often wonder what the world of aviation would be like now, if Boeing (instead of French/Poms) had developed the first viable SST.