With today's sentencing of T.J. Lane, look back at other major school shootings in U.S. history.
In December 2012, gunman Adam Lanza massacred 20 first-graders and six staff membesr at Sandy Hook Elementary School in Newtown, Conn. He shot his mother to death before going to the school, and killed himself as authorities arrived.
Wisconsin Dept. of Natural Resources
Enrique Castro-Mendivil / Reuters
Gene Blevins / Reuters
Patrick T. Fallon/Reuters
Larry Downing / Reuters
It's easy to upload your photos and/or videos on News8000.com. Once you do, we'll share your upload with the community!