Event:
U.S. Mariner 10 makes 3rd and final fly-by of Mercury
More Notable Events on March 16:
1988 U.S. sends 3000 soldiers to Nicaragua's neighbor Honduras
1968 Robert F. Kennedy announces presidential campaign
1941 National Gallery of Art opens in Washington D.C.
1882 U.S. Senate ratifies treaty establishing the Red Cross
1881 Barnum and Bailey Circus debuts
