1630 - Italian Jesuit Niccolo Zucchi saw the belts on Jupiter's surface.
1756 - Britain declared war on France, beginning the French and Indian War.
1792 - The New York Stock Exchange was founded at 70 Wall Street by 24 brokers.
1875 - The first Kentucky Derby was run at Louisville, KY.
1932 – The U.S. Congress changed the name "Porto Rico" to "Puerto Rico."
1939 - The first fashion to be shown on television was broadcast in New York from the Ritz-Carleton Hotel.
1954 – The U.S. Supreme Court unanimously ruled for school integration in Brown vs. Board of Education of Topeka. The ruling declared that racially segregated schools were inherently unequal.
1973 – The U.S. Senate Watergate Committee began its hearings.
1996 – Former President Clinton signed a measure requiring neighborhood notification when sex offenders move in. Megan's Law was named for 7-year-old Megan Kanka, who was raped and killed in 1994.
2000 - Austria, the U.S. and six other countries agreed on the broad outline of a plan that would compensate Nazi-Era forced labor.
2007 - Trains crossed the border dividing North and South Korea for the first time since 1953.