you can see either side of that. the roofing nails is a -- the carpenter nails, as they've been described by the doctor, is significant. in the atlanta bombing in 1996, roofing nails were put in a plastic food container put next to the pipe bomb in a knapsack, when it exploded roofing nails went out and the one woman that was killed by the bomb itself was hit with a roofing nail and it killed her. the other fatalities and awe journalist who had a heart attack running to the scene. the woman was killed by a roofing nail. the fbi was able to track those nails to where they were manufactured, what was significant was that there was a defect at the plant so that it made a certain run of nails unique which were trackable to where they were sold. again that provided additional evidentiary and lead value in the investigation. so the embedded shrapnel, embedded in the bomb itself, that has been removed by the doctors from the victims, could