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.

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Aug. 20, 1986: Postal worker Pat Sherrill, 44, shot 14 at a post office in Edmond, Okla., before killing himself.

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