Museum of Flight, Seattle
I have to visit any aviation museum that is easily accessible from a city I am in, and when I visited Seattle some time ago I had to go to the ‘Museum of Flight’.
What a pity Concorde does not fly any more. Did you know that here have been more U.S. astronauts than Concorde pilots ?!
Air Force One
Boeing AWACS for Royal Saudi Air Force
The sale of surveillance planes to Saudi Arabia by the Reagan administration (some 25 years ago) was a controversial part (it was objected by Israel) of what was then the largest foreign arms sale in US history. 
Grunman Intruder
Sorry, but I cannot help it, from the ‘Top Gun’ movie:
Great Air Museum and a must-visit if you are in Seattle, IMO. I’ve also been to the Pacific Aviation Museum in Pearl Harbor. Pretty good too!
I was there this weekend. Kind of a bummer the 747 wasn’t open for viewing. Otherwise fantastic museum