[ctdonath2]

And by the second blast, cell towers were jammed with 911 & other calls, interfering with further dial-a-detonator calls to remaining devices.

[Carry_Okie]

And by the second blast, cell towers were jammed with 911 & other calls, interfering with further dial-a-detonator calls to remaining devices.

I doubt it. If it was a minute between blasts, I might agree with you. The first reaction is WTF, the second is OMG, and the third might be be 'dig out the phone and call 911.' The space between the two bombs was about twenty seconds.