of moving parts, an investigation that is quickly developing here. you definitely had a sense throughout the day that whatever was developing was developing in a rather frantic pace and various locations and in many locations across the city. >> ed lavandera, appreciate your reporting. we'll continue checking in with you. i want to bring in our law enforcement team, james galliano, tom fuentes as well as on the phone josh campbell and bob baer. josh, based on your experience with the fbi, what do you make of, a, this pattern and sort of the uptick in the number of blasts that we have been seeing? >> well, it's a very tough scenario. you know, each new day seems to bring some new dangerous development. i talked earlier with a law enforcement who has been briefed on the ongoing investigation, and he opined the fact that we have moved from a victim-initiated device to a trip wire shows that this is someone who is playing around with different packaging, different initiators, and this type of sophistication and knowing we're dealing with someone who can move across these explosive platforms shows just how deadly the situation is and how difficult the ongoing investigation is. i think it's important,