Event:
Chelsea Clinton and her husband, Marc Mezvinsky, announce the birth of their first child, Charlotte, making grandparents of former U.S. presidential couple Bill and Hillary Clinton
More Notable Events on September 26:
1991 2 year experimental Biosphere 2 in Oracle Arizona begins
1990 Motion Picture Association of America creates new NC-17 rating
1988 New York City's Rockefeller Center declared a national landmark
1973 Concorde flies from Washington D.C. to Paris in 3h 33m
1919 U.S. President Wilson hit by a heart attack
