Bagpiper Kevin M. Donnelly stands at attention during the 17th annual Remembrance Ceremony at the Oklahoma City National Memorial & Museum, in Oklahoma City, on April 19.

A Housing and Urban Development employee places flowers on the chairs of bombing victims who worked for HUD, in the Field of Chairs at the Oklahoma City National Memorial & Museum before the start of the 17th annual remembrance ceremony in Oklahoma City on April 19.

Carlos and Renee Moore, the brother and mother of Oklahoma City bombing victim Antonio Ansara Cooper Jr., read a portion of the list of 168 names of the victims during the 17th annual Remembrance Ceremony at the Oklahoma City National Memorial & Museum in Oklahoma City on April 19.

Albert Ashwood, left, and his wife Cindy Ashwood, right, attach a picture of Cindy's sister, Susan Jane Ferrell, to Ferrell's chair in the Field of Chairs at the Oklahoma City National Memorial & Museum, on April 19.

(Left) Stetson Johnson, 18, lies in a hospital bed in Oklahoma City, in April 2011. He said tattoos were forcibly placed on this forehead and chest during an April 17th attack in which he was beaten with a baseball bat and left unconscious. (Right) Stetson holds back his hair to show a tattoo on his forehead in his home in Oklahoma City, May 4, 2011. The new bar code tattoo hides the word "rapest".

Kimberly Kirchler Vergara, (left to right), Zachary Chase Provence, Lorena Amanda Hodges and Richard Lynn Dellert are shown in these April 27th Oklahoma County Sheriff’s Department booking photos. They are accused of pinning down Stetson Johnson and tattooing the word “RAPEST” on his forehead.