CNN Early Start December 31, 2013 10:09:00
What their security measures are but they say each if nthe wake of these bombings they have do change them but the terrorists don't have to attack sochi. as in volgograd, they can attack other targets and they have to travel through certain areas so that is the danger here. terrorists know in this gigantic country, not everything can be secure. often the metal detectors are not working and security guards are not on ball. it's a huge country to police and it doesn't have to be the tiny area around sochi that nets nooee needs to be morned. >> thanks, diana. fiery explosions after a train cras...