FILE - In this Saturday, July 27, 1996, file photo, Shelly Martin of Spokane, Wash., left, and Roselia Norwood of Hawaii react after an explosion occurred in Centennial Park in Atlanta during the 1996 Summer Olympics. (AP Photo/Doug Mills, File)

FILE - This Saturday morning, July 27, 1996, file photo shows an overview of Centennial Park in Atlanta after an explosion struck a tower near a stage where thousands of people were watching a concert(AP Photo/Clive Brooks, File)

FILE - This Sunday, July 28, 1996, file photo shows Centennial Park at the 1996 Olympic Games in Atlanta, the day after an explosion centered at the bottom of the temporary tower, in the foreground. (AP Photo/John Gaps III, File)

FILE - In this Saturday morning, July 27, 1996, file photo, an investigator walks past the bloody brick walkway near the scene of an explosion at Centennial Olympic Park in Atlanta. The bricks were part of a national fund drive to help build the park and have personal inscriptions from patrons of the Centennial Park. (AP Photo/John Gaps III, File)

FILE - In this Saturday, July 27, 1996, file photo, American's Jonathan Holland, left, and Michael Peterson pause for a moment of silence for those killed and injured in an explosion at Atlanta's Olympic Centennial Park Saturday morning, before their men's coxless pair race at Lake Lanier near Gainesville, Ga. (AP Photo/Tannen Maury)