I am a NASA fan, but this was the most wonderful experience, every kind of aircraft engine, and aircraft you can think of was here. From the Wright Brothers to solar gliders, of course the fabulous and awesome Space Shuttle Discovery, Apollo 11 the real capsule, you name it it is here. A Concorde, the Enola Gay, an old Boxcar, SR-71, the cockpit of a Goodyear Blimp.... the list goes on. Plan for a solid 5 -6 hours. If you read everything it will take you all day. It was 100's of planes, German, Russian, French, English I was mesmerized. They even have replicas of the first satellites. Then to top it all off there are four different movies in IMAX. This museum is worth the trip to find it by Dulles Airport. You can go up in the old tower and watch planes landing and taking off.