Oklahoma City ? Oklahomans and victims’ relatives paused Saturday at the Oklahoma City National Memorial for a simple, poignant ceremony to remember the 168 people killed 13 years ago in the bombing of the Alfred P. Murrah Federal Building.

The attack on April 19, 1995, is the deadliest act of domestic terrorism in U.S. history.

“The evil act perpetrated here illustrated the depths of human depravity,” Gov. Brad Henry said. “But Oklahomans met tragedy with triumph. From such a horrible crime came tales of astounding goodness.”

At 9:02 a.m., the moment of the bombing, people attending the service observed 168 seconds of silence for each of the bombing’s victims. Victims’ names also were read aloud.