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This day in history

Tuesday, Aug. 20, is the 232d day of 2013. There are 133 days left in the year.

Today’s birthdays: Boxing promoter Don King is 82. Former senator George Mitchell (D-Maine) is 80. Former US representative Ron Paul (R-Texas) is 78. Broadcast journalist Connie Chung is 67. Rock singer Robert Plant (Led Zeppelin) is 65. TV weatherman Al Roker is 59. Movie director David O. Russell (“The Fighter”) is 55. Rock singer Fred Durst (Limp Bizkit) is 43. Actress-singer Demi Lovato is 21.

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In 1866, President Andrew Johnson formally declared the Civil War over, months after fighting had stopped.

In 1882, Tchaikovsky’s ‘‘1812 Overture’’ had its premiere in Moscow.

In 1910, forest fires swept through parts of Idaho, Montana, and Washington, killing at least 85 people and burning 3 million acres.

In 1940, during World War II, British Prime Minister Winston Churchill paid tribute to the Royal Air Force before the House of Commons, saying, ‘‘Never in the field of human conflict was so much owed by so many to so few.’’

In 1953, the Soviet Union publicly acknowledged it had tested a hydrogen bomb.

In 1968, the Soviet Union and other Warsaw Pact nations began invading Czechoslovakia to crush the ‘‘Prague Spring’’ liberalization drive.

In 1972, the Wattstax concert took place at the Los Angeles Memorial Coliseum.

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