imported post
Also, you have to remember that the prohibition against firearms in government buildings is not 100% absolute. You can take a firearm into a state or locally owned government building with permission of the proper authorities. We have permission of the proper authority to take your gun into the airport, as long as it's done within the TSA's rules.
Para is referring to:
TITLE 18 - CRIMES AND CRIMINAL PROCEDURE
PART I - CRIMES
CHAPTER 44 - FIREARMS
-HEAD-
Sec. 926A. Interstate transportation of firearms
-STATUTE-
Notwithstanding any other provision of any law or any rule or
regulation of a State or any political subdivision thereof, any
person who is not otherwise prohibited by this chapter from
transporting, shipping, or receiving a firearm shall be entitled to
transport a firearm for any lawful purpose from any place where he
may lawfully possess and carry such firearm to any other place
where he may lawfully possess and carry such firearm if, during
such transportation the firearm is unloaded, and neither the
firearm nor any ammunition being transported is readily accessible
or is directly accessible from the passenger compartment of such
transporting vehicle: Provided, That in the case of a vehicle
without a compartment separate from the driver's compartment the
firearm or ammunition shall be contained in a locked container
other than the glove compartment or console.