Finished in 1943, the Pentagon is a symbol of U.S. military might. It's also one of the places attacked on 9/11.
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.
Many foods that you think have health benefits may hold hidden dangers for your diet.
Jason Merritt/Getty Images
With Ringo Starr celebrating his 75th birthday Tuesday, see how he and other rockers from the 1960s and 1970s have aged over the years.