The Pentagon is a large building in Arlington, Virginia (near Washington, D.C.), that is the headquarters of the United States Department of Defense. It has five sides and it is white. It is in the shape of a pentagon. It has seven floors.[] There are 23,000 people working in it.
The Pentagon is the biggest office building in the world, but you can reach any place in the building within 7 minutes.
They began building it on September 11 1941. Exactly sixty years later, on September 11 2001, it was hit with an airplane by terrorists. One hundred eighty-four people in the building were killed.
The pentagon has