A Week in History: The Beatles Arrive, Mandela Freed, Deep Blue Wins

The Beatles invade and Deep Blue beats Kasparov.

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Feb. 6, 1865 Robert E. Lee is officially named general-in-chief of all Confederate armies.

Feb. 7, 1964 The Beatles land in New York for their first U.S. tour and are greeted by more than 3,000 screaming fans.

Feb. 10, 1996 IBM supercomputer Deep Blue first beats reigning chess champion Garry Kasparov.

Feb. 11, 1990 Antiapartheid leader Nelson Mandela is released after nearly 27 years in prison.

Feb. 12, 1915 The Lincoln Memorial's cornerstone is laid on the 106th anniversary of the president's birth.