With Tuesday's school shooting in Oregon, look back at other major school shootings in U.S. history.
Dec. 14, 2012: Gunman Adam Lanza massacred 20 first-graders and six staff members 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.
Russian Federal Space Agency
John Stillwell/Royal Family
iStock / rojoimages
From Family Photos/CNN
It's easy to upload your photos and/or videos on News8000.com. Once you do, we'll share your upload with the community!