This year marks the 20th anniversary of the largest act of domestic-borne terrorism in the United States. On the morning of April 19, 1995, a bomb exploded at t...
Remembrance Ceremony Jennifer Walker, center, of Ardmore, Okla., stands at the chair of her father, David Jack Walker, in the Field of Chairs at the Oklahoma City National Memorial and Museum, following the 17th annual Remembrance Ceremony in Oklahoma City, Thursday, April 19, 2012. With her are her two children, Walker, left, named for her father, and Graecin, right. (AP Photo/Sue Ogrocki)