But what about the boys who played Doom and then killed their classmates at Columbine High School?

The main speaker was Tom Mauser, whose son was killed at Columbine High School.

A1 2 Columbine Students Killed Two sophomores at Columbine High School were found shot to death in a sandwich shop where one of them worked, near the Colorado school.

Tom Mauser, whose son, Daniel, was killed last April at Columbine High School in Littleton, Colo., was one of the guests invited to sit beside Mrs. Clinton.

The life of Cassie Bernall, a 17-year-old junior who was killed at Columbine High School in Littleton, Colo.

Rachel Scott was the first person killed at Columbine High School on April 20, 1999.

The shooting occurred a month after two teen-agers killed 13 people and themselves at Columbine High School in Littleton, Colo.

Push for Columbine Inquiry The parents of a student killed at Columbine High School think they can now prove their son was accidentally shot by the police.

The acrimony underscored again how potent and volatile the issue of gun control had become in the three weeks since 15 people were killed at Columbine High School in Littleton, Colo.

Following is biographical information about 11 students and 1 teacher killed on Tuesday at Columbine High School in Littleton, Colo.