sophistication put into constructing it through this timer device. it just wasn't successful from the terrorist's point of law. >> thankfully on that. matthew chance thank you very much. joining me paul crew zang. paul in terms of the bomb itself, the fact that it didn't work is a huge blessing for investigators, in order to figure out the signature of the maker if that i have seen one like this before. >> that's absolutely right, i think the forensics and the lab that's there is excellent. they got to figure out what kind of device it was, whether there were any bomb signatures which might lead back to a particular bomb maker. the reason they're alert right now is because they believe the bomb maker is still at large and could put together more devices. this was essentially a dud bomb, the initial assessment was there a likelihood that contained