Shooting http://en.wikipedia.org/wiki/Columbine_High_School_massacre The Columbine High School massacre (often known simply as Columbine ) was a school shooting which occurred on April 20, 1999 , at Columbine High School in Columbine , an unincorporated area of Jefferson County , Colorado, United States. Two senior students, Eric Harris and Dylan Klebold , embarked on a