It's free and open from 10am-5:30pm. There's 3 floors of exhibits so a lot of stuff that can take at about half the day
It only cost the time it takes to stand in line for security, so basically it's free. Btw, there are two lines, one for people with bags, and one for people without and the one without is usually shorter.
It cost $0.00. Donations are however accepted
it's free, but donations are accepted so it can keep running.
It's Free
Free
It's free like all Smithsonian Museums on the Mall
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