Survivors and family members of those who died in the bombing of the Oklahoma City federal building are expected to gather to commemorate the 15th anniversary of the attack.
Hundreds of people are expected at the Oklahoma City National Memorial today to remember the 168 people killed in the 1995 explosion at the Alfred P. Murrah Federal Building. More than 600 others were injured in the attack.
Homeland Security Secretary Janet Napolitano is expected to speak during a ceremony scheduled to begin shortly before 9:02 a.m. -- the time of day the bomb detonated in 1995.
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