Mass shootings in U.S. history

Published On: Jul 20 2012 09:20:30 AM CDT   Updated On: Aug 24 2012 10:23:52 AM CDT

Take a look at some of the worst mass shootings in U.S. history.

Mass shootings - Binghamton, NY shooting
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Lucas Jackson/Reuters

April 3, 2009: Gunman Jiverly Wong, 42, burst into a citizenship class at an immigration center in Binghamton, N.Y., killing 13 and wounding four before killing himself.

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