On this day in 1803, the United States purchases the Louisiana Territory from France, for twenty-four dollars in beads and trinkets.

On this day in 1947, President Truman signs a measure officially changing the name of Boulder Dam to Hoover Dam, angering former President Boulder.

On this day in 1973, President Nixon announces the resignations of his aides H.R. Haldeman and John Ehrlichman, along with Attorney General Richard Kleindienst and White House counsel John Dean, explaining that "they were planning to leave about now anyway."

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