![This Day in History for April 20 – Columbine Massacre and More](http://wac.450f.edgecastcdn.net/80450F/tsminteractive.com/files/2012/04/columbine.jpg?w=980&q=75)
This Day in History for April 20 – Columbine Massacre and More
Here’s a look at some interesting events that took place on this day in history:
1861 – Robert E. Lee resigns his commission in the US Army in order to command the forces of Virginia (More info)
1902 – Pierre and Marie Curie isolate radium (More info)
1916 – The Chicago Cubs play their first game at Weeghman Park, which later becomes Wrigley Field (More info)
1999 – Two students kill 13 people and injure 24 others before committing suicide at Columbine High School in Colorado (More info)
2008 – Danica Patrick wins the Indy Japan 300, becoming the first female driver to win an Indy car race (More info)
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