Farmer Andrew Kehoe sets off two explosions at a school killing himself, 6 adults, and 38 children.
Convict Paul Orgeron exploded a suitcase of dynamite on a playground. He killed himself, 2 adults, and three children.
Jason Robinson, 16, was stabbed to death in his class room by 3 teenage attackers who invaded the class room.
David Taber invaded a middle school and took 3 hostages. Then shot and killed the nurse Carol Day. He was found not guilty due to insanity.
Two masked gun men killed Damion Blocker in a stairwell. Darrick Evans, 16, was given a sentence of 41 years to life in prison.
Michael Carneal, 14, opened fire on a school prayer group and killed 3 girls. He is serving life in prison.
Eric Harris and Dylan Klebold, kill 12 students and one teacher before committing suicide in the school library. http://www.glynn.k12.ga.us/BHS/academics/junior/durham/hollym36456/picture4.jpg
Nathaniel Brazill, 13, was sent home for misbehaving. He returned to school and shot his teacher.
Charles "Andy" Williams, 15, kiled two classmates and injures 13 others.
A gunman opened fire in an elementary school in Newtown, killing 30 people, most of them children. http://ionenewsone.files.wordpress.com/2012/12/sandy-hook-elementary-school-in-newtown.jpg?w=640&h=402