With Tuesday's school shooting in Oregon, look back at other major school shootings in U.S. history.
Aug. 1, 1966: Charles Whitman pointed a rifle from the observation deck of the University of Texas at Austin’s Tower and began shooting in a homicidal rampage that went on for 96 minutes. Sixteen people were killed and 31 were wounded.
Warner Bros. Pictures
Andrea De Stefani/SXC
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