Video: 'ABC News special reports on the Columbine High School shootings (April 20, 1999)'
(Tuesday, April 20, 1999, 11:19 a.m.–12:08 p.m. MDT; during the Columbine High School massacre) — Two students stormed into Columbine High School at lunch time today with guns and explosives, killing 12 classmates and one teacher in a five-hour siege. Continue reading 12 students, 1 teacher killed in Columbine High School massacre 20 years ago this hour #OnThisDay #OTD (Apr 20 1999)