In 1927, in Bath Township, Michigan, Andrew Kehoe, blows up the Bath Consolidated School, killing 45 people and injuring 58, mostly grade school children.
April 16, 2007: A gunman kills 32 people at Virginia Tech.
Sept. 2, 2006: Douglas W. Pennington, 49, Shepherd University in Shepherdstown, W.Va.
Oct. 28, 2002: Failing University of Arizona Nursing College student Robert Flores, 40.
Jan. 16, 2002: Graduate student Peter Odighizuwa, 42, dismissed from Virginia’s Appalachian School of Law.
Aug. 28, 2000: James Easton Kelly, 36, at University of Arkansas.
April 20, 1999, Eric Harris and Dylan Klebold at Columbine High School.
Aug. 15, 1996: Frederick Martin Davidson, 36, a graduate engineering student at San Diego State.
Nov. 1, 1991: Gang Lu, 28, from China, at the University of Iowa campus.
May 4, 1970: Four students by National Guard troops at Kent State University in Ohio.
Aug. 1, 1966: Charles Whitman from observation deck at University of Texas.