I haven’t heard of any acts of terrorism in Russia lately. Lots of state repression, yes, but no terrorism. In 2004 there were several plane hijacking and the Beslan mass murder. And then nothing.
Granted, Russia has moved a long way to dictatorship (making terrorism less effective) in that period, and secret policing is something they do well. It’s still odd though. It’s not as if the Chechens would become more peaceful in last three years.