lApril 16, 2007: Seung-Hui Cho, 23, kills 32 people and himself on Virginia Tech campus in Blacksburg, Va.

[] Nov. 20, 2006:<$> Sebastian Bosse, 18, opens fire at former school in Emsdetten, Germany, before killing self. Five people are wounded and dozens hospitalized for smoke inhalation after he sets off smoke bombs.

[b Sept. 13, 2006: <$>Kimveer Gill, 25, opens fire in cafeteria at Dawson College in Montreal, slaying one student and wounding 19 before killing self.

[bul] April 26, 2002: Robert Steinhaeuser, 19, who had been expelled from school in Erfurt, Germany, kills 13 teachers, two former classmates and policeman, before comting suicide.

[bul] April 28, 1996: Martin Bryant, 29, bursts into cafeteria in seaside resort of Port Arthur in Tasmania, Australia, shooting 20 people to death. Driving away, he kills 15 others. He was captured and imprisoned.

[bul] March 13, 1996: Thomas Hamilton, 43, kills 16 kindergarten children and their teacher in elementary school in Dunblane, Scotland, and thkills himself.

[bul] Dec. 6, 1989: Marc Lepine, 25, bursts into Montreal’s Ecole Polytechnique college, shooting at women he encounters, killing nine and then himself[bul] Aug. 19, 1987:<$> Michael Ryan, 27, kills 16 people in small market town of Hungerford, England, and then shoots himself dead after being cornered by police.