1866 – Alexander II of Russia narrowly escapes an assassination attempt by Dmitry Karakozov in the city of St. Petersburg
1900 – Assassination attempt on Prince of Wales, later British King Edward VII when shot by Jean-Baptiste Sipido in protest over Boer war
1917 – US Senate agrees (82-6) to participate in WWI
1938 – 5th US Masters Tournament, Augusta National GC: Henry Picard wins his only Masters, 2 strokes ahead of runners-up Harry Cooper and Ralph Guldahl
1958 – The CND Peace Symbol displayed in public for the first time in London
1970 – Firestone World Tournament of Champions won by Don Johnson
1990 – Security law violator Ivan Boesky is released from federal custody
1994 – Largest Opening Day crowd at Yankee Stadium, 56,706
2007 – 15 British Royal Navy personnel held in Iran are released by the Iranian President.
2012 – Boris Tadić, President of Serbia, resigns