The massacre at Umpqua Community College in Roseburg, Oregon, is the latest in a tragic list of mass shootings that have taken place across the country, at schools and elsewhere.
Here is a list of some of the other shootings across America that claimed the most lives, according to NBC News.
Thirty-two people were killed on April 16, 2007, when 23-year-old Virginia Tech student Seung-Hui Cho shot and killed 32 people on campus in Blacksburg, Virginia, before killing himself.
On Dec. 14, 2012, Adam Lanza killed 28 people, including himself and his mother, at Sandy Hook Elementary School in Newtown, Connecticut.
George Hennard crashed his pickup through a cafeteria on Oct. 16, 1991, in Killeen, Texas, where he shot and killed 23 people before shooting and killing himself.