On this day: February 21

Published: Feb 21 2013 12:46:53 AM EST   Updated On: Feb 21 2014 02:00:00 AM EST

The Washington Monument is dedicated, Alka-Seltzer is sold for the first time, the peace symbol is born, Malcolm X is assassinated, and Nixon heads to China, all on this day.

OTD February 21 - David Letterman
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CBS Television

2000: David Letterman returns to the late-night talk show "Late Show with David Letterman" about five weeks after having an emergency quintuple heart bypass operation. Letterman brought all but one of the doctors and nurses on stage who had participated in his surgery and recovery to tearfully thank them.

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Slideshow Of The Day

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    REUTERS/Dylan Martinez

    Celebs react to Scotland's independence vote

    On September 18, Scots will go to the polls to vote on the future of their country. The outcome could end Scotland's 307-year union with England and Wales as Great Britain -- and see it launch into the world as an independent nation of some 5.3 million people. Take a look at celebrity (both Scottish and not) reactions to the referendum.

On this Day

  • Civil War, Battle of Antietam painting

    Library of Congress

    On this day: September 17

    The U.S. Constitution is signed, the Civil War sees the bloodiest battle in American history, the prototype space shuttle Enterprise is unveiled, and the Camp David Accords bring peace between Egypt and Israel, all on this day.