Coincidentally, the gang had also robbed several trains in the past, posing as passengers and pulling the communications cord to stop them at convenient points between stations.
Campaigners against this kind of data retention have, since the April ruling, been applying huge pressure on communications companies to stop retaining their data.
The attack, which was in an area also frequented by Russian forces, led to sharp criticism from Moscow after it emerged that Russian attempts to use a communications hotline to stop the attack were not answered for nearly half an hour.
The intention here is clearly to stop communications between terrorists who are plotting an act of violence.
"These are all critically important," said Ladd Everitt, director of communications for the Coalition to Stop Gun Violence.
Ladd Everett, director of communications for the Coalition to Stop Gun Violence, says manufacturers are simply making a financial calculation in the current push to make it cheaper and easier for people to get silencers, despite the potential for misuse.
The definition of who should be prohibited from obtaining firearms is flawed, so it limits people who don't pose a threat while at the same time allowing potentially dangerous people to get guns, said Ladd Everitt, the director of communications for the Coalition to Stop Gun Violence.
He also announced his intent to stop the communications commission appointment of the Daschle aide, Jonathan Adelstein.
The Federal Communications Commission has voted to stop Verizon Communications from trying to talk its customers out of switching to another telephone provider while they wait for their phone numbers to be transferred.
Modern communications technology makes them difficult to stop.
I'd be shocked if they didn't," said Ladd Everitt, communications director of the Coalition to Stop Gun Violence.
