Pentagon
The Pentagon is the headquarters for the United States DoD (Department of Defense). It is located in Arlington, Virginia. The Pentagon also has the reputation of being one of the largest office building in the world.
Background
In "A Ladder to Heaven", the military staff stationed in the Pentagon try to stop Saddam Hussein from building weapons of mass destruction in Heaven.
In "Imaginationland, Episode II" & "Imaginationland, Episode III", the military tries to stop terrorist from getting into people's dreams by nuking Imagainationland.
In "Members Only", then President-elect Garrison is given a tour of the building.
In "Not Funny", President Garrison monitors the developments with TrollTrace.com
In "The End of Serialization as We Know It", the military makes contact with President Garrison as the TrollTrace website goes online.