It has a suggested admittance of 15 dollars each. Well worth it.
It is a suggested donation of $15. But they asked us how much we wanted to donate when we went. You can simply choose to donate nothing.
The museum is free, like many of the museums in DC. However, they encourage you to donate. When I went they asked and you can politely say no, with no consequences. Some of the exhibits in the museum do carry a charge.
$15 donation
They take donations
Free
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