(From Red State)
The fact that CNN allowed their employees close enough to the device to take images, it leads one to believe that it was known pretty early that this device was a hoax (no I don’t believe this was a police leak). . . .
As it seems likely that all the bombs were constructed by the same person or person(s), it seems likely that none of the devices were functional and the purpose was to intimidate and scare the bejeezus out of the target rather than kill or maim.