Crowd and really didn't arouse too much suspicion. this type of device based on what i've seen so far, some wiring, some batteries, the color of the smoke during the ignition, i would say that this device could easily be fired just by exposing the material to an electrical charge. >> there's a little circuit breaker we saw, is that how they would have done it? >> well, no. it would be as simple as a bald wire or the filament from a light bulb. >> the fact that they stayed around to see the explosions, what does that tell you about potentially the kind of construct of this device? >> well, it c...