I have been to Kennedy; good visit, bit touristy, the IMAX movie is neat and the history impressive. DC Space and Aero museum is also a must do for its general aviation exhibits and moon stuff.

fln8tive, with a client, I assume in a restaurant; you heard the boom above general restaurant chatter ? Did you hear it as two distinct noises ?

I've heard many Concorde sonic booms in the west of southern England; never as a double, de-accelerating boom. Mostly as a distant, yet obvious rumble which I assumed was a west bound departure noise beyond the approved (noise abatement) acceleration point.