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In 1899, a fire destroyed a major portion of Dawson City in Canada's Yukon Territory.
In 1965, a Bureau of Commercial Fisheries vessel began a two-month voyage to explore potential bottom-fishing grounds along the Continental Shelf.
In 1967, the Civil Aeronautics Board gave Alaska Airlines temporary permission to serve Sitka.
In 1988, the first expedition to cross the Arctic on foot reached the North Pole.
In the nation
In 1607, English colonists went ashore at present-day Cape Henry, Va., on an expedition to establish the first permanent English settlement in the Western Hemisphere. (They later settled at Jamestown.)
In 1865, John Wilkes Booth, the assassin of President Abraham Lincoln, was surrounded by federal troops near Bowling Green, Va., and killed.
In 1961, Roger Maris of the New York Yankees hit the first of a record 61 home runs in a single season.
In 1968, the United States exploded beneath the Nevada desert a 1.3 megaton nuclear device called "Boxcar."
In 1970, the Stephen Sondheim musical "Company" opened at the Alvin Theatre in New York.
In 2000, Vermont Gov. Howard Dean signed the nation's first bill allowing same-sex couples to form civil unions.
In 1997, in his Saturday radio address, President Clinton prepared for the opening of a community service summit by asking Congress to pay for a drive to ensure that every third-grader can read.
In 2002, David Gunn, who had run transit systems in New York City and Washington, was named president of Amtrak, the troubled national rail passenger service.
In the world
In 1937, planes from Nazi Germany raided the Basque town of Guernica during the Spanish Civil War.
In 1945, Marshal Henri Philippe Petain, the head of France's Vichy government during World War II, was arrested.
In 1964, the African nations of Tanganyika and Zanzibar merged to form Tanzania.
In 1986, the world's worst nuclear accident happened at the Chernobyl plant in the Soviet Union. An explosion and fire killed at least 31 people and sent radioactivity into the atmosphere.
In 2002, Robert Steinhaeuser, an expelled student, went on a shooting rampage at a school in Erfurt, Germany, killing 17 people, including himself.
In 2006, Secretary of State Condoleezza Rice and Defense Secretary Donald H. Rumsfeld paid a surprise visit to Iraq, where they embraced the country's fledgling leaders as independent.