The Pentagon is the headquarters of the United States Department of Defense, located in Arlington County, Virginia, across the Potomac River from Washington, D.C. As a symbol of the U.S. military, The Pentagon is often used metonymically to refer to the U.S. Department of Defense.

This is the Pentagon. It's the building where American generals make decisions. It was damaged and people were killed on September 11, 2001 when Muslim scum flew a plane into it.

In 1970 I was drafted into the Army during the Vietnam war. I never had to leave the states because the Army needed my computer programming skills. I worked in an office building near the Pentagon. I frequently had to go to the Pentagon because that's where the big mainframe computer was. I went there to test the computer software I coded.

One time I decided to go the Pentagon at night to get some work done. While there I decided to take a walk in the center of the building which was outside. There I was in the center of the Pentagon, just me, the trees, and thousands of singing birds. All this while we were in a war that was killing thousands of American soldiers.

It was a weird experience and I will never forget it.