Event:
Canada becomes the 4th country to permit same-sex marriage
More Notable Events on July 20:
1994 O. J. Simpson offers $500,000 reward for evidence of ex-wife's klller
1988 Michael Dukakis selected Democratic presidential nominee
1984 Vanessa Williams is asked to resign as Miss America
1976 U.S. Viking 1 lands on Mars at Chryse Planitia, 1st Martian landing
1969 1st men on Moon, Neil Armstrong and Edwin Aldrin, Apollo 11
