The Pentagon

It is the largest office building in the world, and the home of the American military establishment. When it comes to war, these are the literal corridors of power. Archival footage shows it under construction, and its progress from the drawing board to today. Engineers reveal the reasons behind its unique shape and show off some of the innovative features that have helped the nearly 60-year-old headquarters handle the changing demands of its occupants over the decades. Ann all-acces tour to rooms rarely seen by the public, and new footage documents the destruction of the September 11th attack that scarred the Pentagon and claimed the lives of over 100 workers in the building.