Originally Posted By: Grouch
Do the regulations forbid pepper spray?

From Smithsonian — Visitor Information: Security and Policies:

“Do not bring any sharp items into the museums such as knives (including pocket or ‘Swiss Army’-style knives), screwdrivers, scissors, nail files, corkscrews, etc. Other items not permitted include firearms, pepper spray, and Mace.”
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“Hiking is just walking where it’s okay to pee. Sometimes old people hike by mistake.” — Demitri Martin