The Pentagon
With 17.5 miles of corridors and a total floor area of 6.6 million square feet, the Pentagon is a military complex like no other.
Related Videos
U.S. Government and Politics1:00m watch
Turning Over the White House
The White House is meant to reflect its occupant, and when a new president comes to town, things have to be changed very quickly. But what goes into the peaceful transfer of power? And how do workers turn the White House over in the blink of an eye?