vehicle. that s when the call was placed calling in the fire department and the bomb squad to immediately inspect the vehicle. here is something else that was kind of interesting that i m told. this official tells me that the detonator, which would have been the clock with the batteries that started to ignite what was going on inside, igniting the fireworks, that that actually might have acted as sort of diffusing the rest of the bomb. that s one thing that investigators are looking at. obviously, it didn t perform as it was supposesed to. they are looking to find out how it worked every step along the way. they believe it is possible that the elements started to burn. once people started to see the smoke and hear the popping noises as have been described to allan chernoff by the vendors and other witnesses, the popping noises might have been the effect of the diffusing that was going on.