Herbert Hoover, America’s 31st president, took office in 1929, the same year the U.S. economy plummeted into the Great Depression.

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In his 1932 acceptance speech for the Republican nomination for president, President Herbert Hoover promises to continue his reconstruction efforts if he has a chance at a second term.

Herbert Hoover

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.

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?

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.

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