The Virginia Tech shooting in 2007 was the deadliest school shooting in U.S. history, with 32 people killed and 17 injured. The shooter, Seung-Hui Cho, was a Virginia Tech student who had previously been diagnosed with a severe mental illness. The attacks sparked debates around gun control laws, mental health treatment, and the responsibility of colleges. They also led to criticism of media organizations that aired portions of the shooter's manifesto. In the aftermath, efforts increased to allow concealed carry of firearms on college campuses, though most states continue to ban guns at schools.