The Pentagon is the military headquarters and the defense of the United States Department of Defense, located in Arlington County, Virginia, USA. Here there are a lot of weapons and various military technologies of the United States. The building was dedicated on January 15, 1943, and was designed by American architect George Bergstrom.
The Pentagon has a very unusual area, making this building as one of the largest buildings in the world, with about 23,000 military and civilian employees and about 3,000 non-defense personnel. The Pentagon has a total area of all buildings reached 610.000 m².