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.
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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.