February 14th

2011
The TV game show 'Jeopardy!' began airing the first of three episodes pitting human players Brad Rutter and Ken Jennings against an IBM computer named 'Watson.'.
Watson (computer)
2008
A former student shot five students to death in a lecture hall at Northern Illinois University before committing suicide.
Northern Illinois University shooting
2006
Iran said it had resumed uranium enrichment, prompting Russia and France to call on Tehran to halt its work.
Nuclear program of Iran
2005
Former Lebanese Prime Minister Rafik Hariri is assassinated. Several sources reported that the U.N. Special Tribunal for Lebanon found compelling evidence for the Lebanese militia Hezbollah's involvement.
Assassination of Rafic Hariri
2003
Dolly the sheep is put to death. Dolly, the first mammal to be cloned from an adult, had shown signs of premature aging and contracted various diseases.
Dolly (sheep)
2001
The Kansas Board of Education reversed its 1999 ruling and restored evolution to the state's science curriculum.
Kansas
1989
Union Carbide finally agrees to pay damages to the Indian government for the Bophal disaster. The company had a yearly turnover of 9.5 billion USD at the time; up to 25,000 people had died in the tragedy.
Bhopal disaster
1979
Adolph Dubs, the U.S. ambassador to Afghanistan, was kidnapped in Kabul by Muslim extremists and killed in a shootout between his abductors and police.
Adolph Dubs
1962
First lady Jacqueline Kennedy conducted a televised tour of the White House.
A Tour of the White House with Mrs. John F. Kennedy
1949
The Knesset, the parliament of Israel, convenes for the first time. The term “Knesset” is derived from the Hebrew name of an ancient Great Assembly: Anshei Knesset HaGedolah.
Knesset
1929
St Valentine's Day Massacre in Chicago, 7 gangsters killed, allegedly on Al Capone's orders.
Saint Valentine's Day Massacre
1920
The League of Women Voters was founded in Chicago.
League of Women Voters
1912
Arizona became the 48th state in the United States.
State of Arizona
1903
The U.S. Department of Commerce and Labor was established.
United States Department of Commerce and Labor
1895
Oscar Wilde's final play, 'The Importance of Being Earnest,' opened at the St. James' Theatre in London.
The Importance of Being Earnest
1876
A G Bell & Elisha Gray apply separately for telephone patents Supreme Court eventually rules Bell rightful inventor.
Alexander Graham Bell
1859
Oregon was admitted to the Union as the 33rd state.
Oregon
1797
The Battle of Cape St Vincent: British fleet under Admiral Sir John Jervis defeats larger Spanish fleet under Admiral Don José de Córdoba y Ramos near Cape St. Vincent, Portugal. Captain Horatio Nelson distinguishes himself.
1790s
1076
Pope Gregory VII excommunicates Holy Roman Emperor Henry IV (for the 1st time).
Henry IV, Holy Roman Emperor
1014
Pope Benedict VIII crowns Henry II Roman German Emperor.
Henry II, Holy Roman Emperor