I thoroughly enjoyed this air museum located next to Washington Dulles airport! The space shuttle Discovery is now permanently on exhibit along with other space satellites and rockets. There is a fantastic collection of airplanes, helicopters, gliders arranged by period, from the beginning of aviation to WWI, WWII, Korean and Vietnam war. Along with the Discovery, SR-71, Concorde and F14 are the must-see! Free tours are given approximately every 20 minutes.
Other attractions in the museum include a tower to watch the takeoffs and landings at Dulles airport, and IMAX theatre and various simulators which charge extra. Food on premises is a McDonalds. I've been to the Intrepid museum in NY and the Midway in San Diego. This was my favorite amongst them.
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