appeared to be the pipe bomb, the wires and a plastic food storage container containing nails. so the two law enforcement officers immediately moved the crowd down the hill, and as they were getting the crowd out of the way and further down below, the device detonated, killing one woman, and then later a journalist had a heart attack running to the scene. but the fact that a trained -- two trained bomb techs actually saw a look at that device under the lid of the knapsack and immediately went to work to get the people out of harm's way gave them a great indication of how it was set up, how it was put together even before it exploded. so that was huge. and the fbi was able to trace later, but it took months to track down the roofing nails that were used because they were able to determine what company made those nails, and then because of a unique glitch in the company's equipment, there was a batch made that had a slight deformity that made that