mercury switch in the first packages, and now he's switching tactics, letting us know that he knows his way around explosives. and he possibly, possibly has the ability to hide his signature, keep his dna off this stuff. as been said, he's been playing cat and mouse with the police. what's going to make it particularly difficult at this point to track him down is there's no obvious political motivation. he's not a neo-nazi. he's not a terrorist that we can tell because these targets seem random at this point. and, you know, are they all connected? two of them are connected, but the rest i don't think so. the other thing we don't know is what kind of explosives and what the initiator was. are we talking about military explosives, or are we just talking about somebody who fabricated a detonator. that's going to be telling the police a lot, you know, just how dangerous the situation is.