On this day in 1927, Leon Trotsky is expelled from the Communist Party, for rowdiness.

On this day in 1954, Ellis Island closes after processing more than 20 million immigrants since opening in New York Harbor in 1892. The doors close with a long line waiting outside.

On this day in 1980, Voyager 1 comes within 77,000 miles of Saturn, "Close enough," says Voyager 1.

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