crime scene right here. they're also poring over chilling photos. these photos just released overnight. over the remnants of one of the detonated devices. these pictures show wires, they show a battery, they show bits of what appears to be a circuit board. these photos coming from the news agency reuters. they say they came from a government official who did not want to be identified but he turned over the photos, along with images of that mangled pressure cooker. now in one photo you can see what appears to be a cluster of bbs. in the photo they're likely melted together by the heat of the blast. but we heard from doctors yesterday saying they were seeing bbs and nails in the victims they were treating. fbi officials also saying the second bomb was in some type of metal container. >> at home it may seem like this was random. it will be tough to pick apart. just the opposite. this type of device, style from the 1970s. known to be an easy way to teach bombmaking. known to be available on the net. the items, different kind of camera batteries, wires, will