weapons, would, i think, pretty clearly indicate greater sophistication. but i think as you just suggested in your piece, we have to be so careful about drawing conclusions too early on. so frankly, fewer bombs means probably less sophistication. but that doesn't tell me as a counterterrorism professional whether this is domestic terrorism like timothy mcveigh, whether or not it's a unabomber or whether or not it's islamic international terrorism. >> governor patrick, governor deval patrick here is taking care to describe the location of the bombing. the boylston street area. that whole area around the finish line of the marathon as an active crime scene. in a technical sense, does that mean that it's still a place in which they are collecting evidence and so essentially has to be sealed from any outside contamination? >> they'll do their best. i mean, i think a large area there is sealed, and certainly the area around the street and the route is going to be very,