On this day: February 21

POSTED: 09:46 PM PST Feb 20, 2013    UPDATED: 11:00 PM PST Feb 20, 2014 
Malcolm X, 1964, Library of Congress

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.