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Democratic aide carting gun in federal building is let off with warning

18 USC § 930 - Possession of firearms and dangerous weapons in Federal facilities

a) Except as provided in subsection (d), whoever knowingly possesses or causes to be present a firearm or other dangerous weapon in a Federal facility (other than a Federal court facility), or attempts to do so, shall be fined under this title or imprisoned not more than 1 year, or both.