If you haven't made it to the Steven Udvar-Hazy National Air & Space Museum located in Chantilly, Va... I highly recommend it. This museum is the sister site to the Washington D.C. Smithsonian National Air & Space Museum AND in my honest my opinion, it has a lot more to offer. The Udvar-Hazy Center is home to the Space Shuttle Discovery and the Lockheed SR-17 Blackbird... to name a few; and it's just minutes from Washington Dulles International Airport. With hundreds of impressive exhibits, tours, simulator rides and more, it truly is an afternoon worthy of your time!! Visit their website for more information.