On this day: January 31

Published On: Jan 31 2013 12:08:38 AM CST   Updated On: Jan 31 2014 01:00:00 AM CST

The first Social Security check is issued, America launches its first satellite into orbit, McDonald's comes to Moscow, and "Avatar" hits the $2 billion mark, all on this day.

OTD January 31 - hydrogen bomb
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Harry S. Truman Library

1950: U.S. President Harry S. Truman announces a program to develop the hydrogen bomb.

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