Corrected entry: In the beginning when they were talking about shutting off the cell phone service to stop the bombs from being detonated, they say "too bad we don't know what cellphone carrier he is using we can block the signal from the tower". When a major bridge is filled with explosives, wouldn't it make more sense to just block ALL the towers regardless of the carrier to be safe?
Boobra
27th May 2007
Correction: David says that the jammer doesn't have the range to block the signal from the truck. He said he needs to find out the carrier so that he/they can shut down "a whole grid of towers", which is what they did.