Who is Harry S. Truman from The World's Great Speeches and what is their importance?

Truman is best known as the thirty-third United States President but also served in the military in World War I, was a Missouri Senator in 1934, and was chosen as Vice President ten years later, taking over as President upon the death of Roosevelt. Truman begins his inaugural address with a plea for the help of the American people, citing the need for full cooperation in order to fulfill the tasks he faces. Truman cites his belief in God and says that America has specific worldwide responsibilities.