1492 — Christopher Columbus notes first recorded reference to tobacco
1715 — Barrier Treaty, Austria cedes area to the Netherlands
1806 — First U.S. college magazine, Yale Literary Cabinet, publishes first issue
1881 — American Federation of Labor (AFL) founded (Pittsburgh)
1919 — Senate first invokes cloture to end a filibuster (Versailles Treaty)
1920 — League of Nations holds first meeting, in Geneva
1939 — Nazis begin mass murder of Warsaw Jews
1939 — Social Security Administration approves first unemployment check
1954 — First regularly scheduled commercial flights over North Pole begins
1964 — Mickey Wright shoots a 62, lowest golf score for a woman pro
1969 — 250,000 peacefully demonstrate in Washington D.C. against the Vietnam War
1988 — PLO proclaims the State of Palestine, recognizes Israeli existence
1990 — President Bush signs the Clear Air Act of 1990
1999 — Next transit of Mercury visible in North America