I'd like to see some mention about how it is legal to carry inside of a post office.
http://www4.law.cornell.edu/uscode/h...0----000-.html
This is what is posted on the poster on the wall in the Post Office:
(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.
Here is subsection d which is not on the poster:
(d) Subsection (a) shall not apply to—
(3) the lawful carrying of firearms or other dangerous weapons in a Federal facility incident to hunting or
other lawful purposes.