Take a look at some of the worst mass shootings in U.S. history.
April 16, 2007: Student Seung-Hui Cho, 23, killed 32 people at Virginia Tech before fatally shooting himself.
Brendan McDermid/Reuters
Boy Scouts of America
Ed Zurga/Reuters
JASON REDMOND / Reuters
Rebecca Vitsmun/iReport
Madi Alexander
ulocal mobile
istock
iStock
Library of Congress
Universal Pictures
TriviaKing/Wikimedia Commons
Jim Castel/CNN
Dan Jackson
iStock / amete
Mario Anzuoni/Reuters
iStock image
Phil McCarten/Reuters
iStock / LawrenceSawyer
Jim Young/Reuters
REUTERS
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