This weekend marks 31 years since the darkest day in Oklahoma history, when the bombing of the Alfred P. Murrah Federal Building in downtown OKC killed 168 people.
Video above: Unsung heroes of Oklahoma City bombing
Looking back on the bombing, the lives lost, those affected and the case from 31 years ago, Hearst sister station KOCO breaks down a timeline of events that led to and followed the tragic moment at 9:02 a.m. on April 19, 1995. Scroll down to learn more…