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...
Oklahoma City Bombing 16th Anniversary A teddy bear sits on a chair in the field of chairs at the Oklahoma City National Memorial and Museum in Oklahoma City, Tuesday, April 19, 2011, on the 16th anniversary of the Oklahoma City bombing. (AP Photo/Sue Ogrocki)