Did you know that the Hoover Dam supplies electricity to more than 20 million people? Get all the facts on this marvel of engineering.

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On September 30, 1935, U.S. Secretary of the Interior Harold L. Ickes formally dedicates the Hoover Dam during a ceremony attended by President Franklin D. Roosevelt. The dam was built by thousands of workers in one of America's most inhospitable environments.

The awe-inspiring Hoover Dam was built in the 1930s from enough concrete to create a two-lane highway from Los Angeles to Boston. How long did America's largest, man-made reservoir take to complete?

See how Henry Kaiser's love for a young lady spurred him to build the Hoover Dam and the great military war ships.

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Known as the “Flying Fortress,” the B-17 was the backbone of the United States’ aerial forces during World War II. Get all the facts and figures.

On October 18, 1931, as the nation faces a deepening depression, President Herbert Hoover announces in his radio address the inauguration of a six-week campaign to raise local relief funds to aid the unemployed.