Deadly school shootings in U.S. history

Published On: Apr 02 2012 04:44:44 PM CDT   Updated On: Dec 12 2014 03:44:56 PM CST

Friday's shooting at an Oregon high school injured at least three students. Look back at major school shootings in U.S. history.

University of Arizona, school shooting
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ERIC THAYER / Reuters

Oct. 28, 2002: Failing University of Arizona Nursing College student and Gulf War veteran Robert Flores, 40, walked into an instructor’s office and fatally shot her. A few minutes later, he entered one of his nursing classrooms and killed two more of his instructors before fatally shooting himself.

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