On this day: May 20

Posted: 5:26 PM EDT May 17, 2013   Updated: 2:00 AM EDT May 20, 2016

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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Slideshow Of The Day

  • 2016 Indianapolis 500 drivers with trophy on Carb Day

    Jamie Squire/Getty Images

    Indy 500 drivers gear up with Carb Day

    Drivers got in one more day of practice for Sunday's 100th running of the Indianapolis 500 with Friday's traditional "Carb Day" at the Indianapolis Motor Speedway.

On this Day

  • Fall of Constantinople, 1453

    Public domain

    On this day: May 29

    Constantinople falls, Bing Crosby records "White Christmas," Edmund Hillary and Tenzing Norgay reach the top of Mount Everest, and Janet Guthrie becomes the first woman to race in the Indy 500, all on this day.