In so many museums in Washington, it is said that this museum is worth visiting, mainly to show the strength of space and Aeronautics in the United States, so there is a lunar landing machine as soon as it goes in, and then there are many real models of aircraft in it. The most important thing is free access, cost-effective, pause is relatively large, if you are interested, you can also play on the many simulation experience machines here. The closure time will be a little later than that of the opposite art museum.