On this day: July 18

POSTED: 03:56 PM PDT Jul 17, 2012    UPDATED: 11:00 PM PDT Jul 17, 2012 

A Nobel Peace Prize winner and astronaut are born, a gymnast reaches Olympic perfection and an epic superhero hits summer theaters, all on this day.

OTD July 18 - Harry Truman
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Harry S. Truman Library

1947: President S. Truman signs the Presidential Succession Act, which places the speaker of the House and the Senate president pro tempore next in the line of succession after the vice president.

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