The Pentagon through time

Published: Aug 24 2011 10:50:38 AM EDT
The Pentagon through time

Finished in 1943, the Pentagon today is the headquarters and a symbol of the U.S. Department of Defense. It is also remembered for being one of the places attacked by airline hijackers on Sept. 11. Take a look at the building through time.

Pentagon Slideshow: Pentagon Around 1950
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Theodor Horydczak Collection/Library of Congress

Construction on the Pentagon started on Sept. 11, 1941, in the midst of World War II. The five-sided design was chosen to accommodate existing roads around the building's original site near Arlington National Cemetery; a different site was ultimately picked, but the design was kept, according to the History Channel.

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