Mass shootings in U.S. history

Published On: Jul 20 2012 09:20:30 AM CDT   Updated On: Jun 13 2016 12:16:38 PM CDT

With 49 victims, Sunday's terrorist attack at an gay nightclub in Orlando now ranks as America's most deadly mass shooting. Take a look at some of the other worst mass shootings in U.S. history.

mass shootings - Columbine
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April 20, 1999: Students Eric Harris, 18, and Dylan Klebold, 17, shot and killed 12 students and one teacher before committing suicide at Columbine High School near Littleton, Colorado. They also injured another 21 people in the attack, with three more injured while attempting to escape the school. It remains the deadliest high school shooting in U.S. history.

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