With today's deadly school shooting in Nevada, look back at other major school shootings in U.S. history.
Sept. 24, 2005: Jason McLaughlin, 15, shoots and kills classmates Seth Bartell, 15, and Aaron Rollins, 17, at Rocori High School in Cold Spring, Minn. McLaughlin was convicted and sentenced to prison. He will not be eligible for parole until he is more than 50 years old.
Keystone Resort/Ben Lindbloom
Jessica Rinaldi / Reuters
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