Jannie Coverdale pauses at the chair of one of her grandsons in the Field of Chairs at the Oklahoma City National Memorial in Oklahoma City, Friday, April 19, 2013. Coverdale lost two grandsons in the... more 
Jannie Coverdale pauses at the chair of one of her grandsons in the Field of Chairs at the Oklahoma City National Memorial in Oklahoma City, Friday, April 19, 2013. Coverdale lost two grandsons in the bombing. Similar to previous years, 168 seconds of silence was observed at 9:02 a.m., when a truck bomb detonated outside the federal building. Survivors and family members recited the names of those killed in the attack. (AP Photo/Sue Ogrocki) less 
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Associated Press | Photo By Sue Ogrocki
Fri, Apr 19, 2013 4:29 PM EDT