In brief, WOW. An overview of the exhibition hall:

An odd view of the Northrop N-1M:

The nose of the Concorde:

And the brooding Enterprise (notice its leading edges are missing, used for the post-Columbia testing):

The list goes on: Gossamer Condor. Blackbird. Enola Gay. Little Stinker...
The Udvar-Hazy Center opens to the public on December 15, and I hope to get back there before the year is out.
Thank goodness Silver Hill is finally yielding up its secrets.