On this day: May 20

Posted: 5:26 PM EDT May 17, 2013   Updated: 2:00 AM EDT May 20, 2015

Vasco da Gama arrives in India, Christopher Columbus dies, Norman Rockwell makes his Saturday Evening Post cover debut, HIV is discovered, and "Cheers" airs its series finale, all on this day.

OTD May 20 - Moore tornado
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Tom Pennington/Getty Images

2013: An EF5 tornado strikes Moore, Oklahoma, killing 24 people -- including seven students at Plaza Towers Elementary school. The tornado injured another 377 people and caused an estimated $2 billion in damage.


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On this Day

  • Ford assembly line in 1913

    Public domain

    On this day: December 1

    Dr Pepper is served for the first time, Ford introduces the first moving assembly line, Rosa Parks refuses to move to the back of the bus, and TWA completes its last flight, all on this day.