Mass Shootings In America By The Numbers Mass shootings as defined by the FBI happen about every two weeks in America. For nearly a decade, USA Today has been tracking these incidents on a website that paints a grim picture.

Mass Shootings In America By The Numbers

Mass Shootings In America By The Numbers

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Mass shootings as defined by the FBI happen about every two weeks in America. For nearly a decade, USA Today has been tracking these incidents on a website that paints a grim picture.