Edited sentence: During the 1990s it was Eric Harris and Dylan Klebold during the Columbine High School massacre that killed 16 people that they became well known Mass murders.The Virginia Tech massacre was a school shooting consisting of two separate attacks approximately two hours apart on April 16, 2007, that took place on the campus of Virginia Polytechnic Institute and State University (Virginia Tech) in Blacksburg, Virginia, United States.The massacre is the deadliest peacetime shooting incident by a single gunman in United States history, on or off a school campus.The perpetrator, Seung-Hui Cho, killed 32 people and wounded many others[1] before committing suicide