This the museum / attraction you must see to believe. It is a huge hangar like facility that has incredible aircraft in it. If you want to be feet from the Space shuttle Discovery, an SR-71, the Concorde, the Enola Gay, and many more historic aircraft, you need to go here. Take the 5A bus from Rosslyn or L’Enfant metro stations to Dulles and the shuttle from there to the museum. It will take about an hour 1 way on the bus. The museum will take 2 to 4 hours. See it.