7.8 Zero Hour: Massacre at Columbine High Sep. 12, 2004 Zero Hour: Massacre at Columbine High IMDb: 7.8 2004 47 min 74 views This movie covers the final hour leading up to the Columbine High Massacre. On April 20, 1999, two boys from Columbine High School in Colorado ... CrimeDocumentaryDramaHistoryTV Movie