terrorists, so that is something that the police are going to have to analyze. they're going to have to take a look for a forensic standpoint he. or it could be something as common as a household chemical that can be used as a means of catalyzing an explosion, so those are the kinds of things they're going have to look at. the if a kt that this explosion did not apparently involve any fatalities is certainly good news. but it is also one of those where there may have been some mistakes made in the assembling of the device. also something where are you have to look at how they got the device through the various security cordons that erin mclaughlin was mentioning earlier in nher reporting. we have to look at these areas before making a concrete judgment. right now, i would certainly look at the possibility of it he booing either a household