The construction of the Pentagon, a symbol of U.S. military power, began 70 years ago

Washington - The Pentagon, in mathematics a pentagon, has been the name of the building housing the United States Department of Defense for decades and, in a broader sense, the word is also perceived as the entire defense establishment and a symbol of American military power. The generously conceived building got its name from its shape. The cornerstone of the building was laid 70 years ago, on September 11, 1941. It was completed in January 1943.
    This reportedly largest administrative building in the world, located in Arlington in close proximity to Washington, was designed by architect George Bergstrom. The Pentagon has seven floors (five of which are above ground) and consists of five concentric pentagons. One side of the largest of them measures over 200 meters. Each of the pentagons is connected on each floor by three hallways that together are nearly 30 kilometers long. The building has over 116,000 square meters of space and accommodates around 26,000 employees. In the center, there is a courtyard with an area of 20,000 square meters. The entire complex is surrounded by gigantic parking lots for about 9,000 cars. The Pentagon is connected to Washington by a network of highways, metro, and buses; it is practically inaccessible on foot.
    Ten years ago, on September 11, 2001, on the 60th anniversary of the start of construction, the Pentagon became one of the targets of terrorist attacks by hijacked planes that destroyed the World Trade Center towers in New York. At the Pentagon, 189 people perished - 64 on board the plane (including five hijackers) and 125 inside the building. Repairing the damaged building cost 740 million dollars.