With today's sentencing of T.J. Lane, look back at other major school shootings in U.S. history.
Feb. 27, 2012: T.J. Lane opened fire inside the cafeteria at Chardon High School in Chardon, Ohio, wounding five students. Three of those students later died. Lane was arrested a short distance away.
Wisconsin Dept. of Natural Resources
Enrique Castro-Mendivil / Reuters
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Patrick T. Fallon/Reuters
Larry Downing / Reuters
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