The 1996 Summer Olympics were about half over on July 27. Spectators, athletes and reporters were enjoying a night out and reviewing the days’ events, congregating on the 21-acre Centennial Olympic Park and listening to a free concert there. Sometime after midnight, a security guard noticed a suspicious bag and began to move people away from the area. The bomb squad was alerted. At 1:20 a.m., the largest pipe bomb in U.S. history exploded, showering the area with shrapnel. One woman was killed by the blast and a cameraman rushing to cover the explosion died of a heart attack. One hundred and eleven people were injured.