1921: The first motorcycle police went on duty in London.
1923: The Duke of York and Elizabeth Bowes-Lyon, later King George VI and Queen Elizabeth, were married in Westminster.
1964: The Rolling Stones released their first album.
1967: A Picasso painting sold for $532,000. It was a record price for a work by a living artist.
1968: The largest underground nuclear device ever to be tested in America, exploded in Nevada.
1982: Number One in the charts was Ebony and Ivory by Paul McCartney and Stevie Wonder.
1986: Radioactive material leaked from a damaged nuclear reactor at Chernobyl. The effects were measured thousands of miles away.
1999: Jill Dando was shot dead on the doorstep of her home in Fulham.
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