I really enjoyed the day as well. You knew you were with a special group when you have United's Washington area Chief Pilot drive the van you're in from the restaurant to the museum.
Speaking of the museum, the visit was exceptional, in part because of the very knowledgeable tour guide and his ability to respond to the highly technical questions from our group. I'd been to the Air & Space museum on the mall in DC twice and didn't even realize this place existed.