Seung-Hui Cho was a South Korean mass murderer responsible for the Virginia Tech shooting in 2007. Cho killed 32 people and wounded 17 others with two semi-automatic pistols on April 16, 2007, at Virginia Tech in Blacksburg, Virginia. This killing is the deadliest school shooting in U.S. history, and was at the time the deadliest mass shooting in U.S. history. A senior-level undergraduate student at the university, Cho died by suicide after police breached the doors of Virginia Tech's Norris Hall which Cho had locked with heavy chains, where most of the shooting had taken place.

The Virginia Tech shooting was a spree shooting that occurred on Monday, April 16, 2007, comprising two attacks on the campus of the Virginia Polytechnic Institute and State University in Blacksburg, Virginia, United States. Seung-Hui Cho, an undergraduate student at the university, killed 32 people and wounded 17 others with two semi-automatic pistols. Six others were injured jumping out of windows to escape Cho.