Since May 2009, 20 suicide-bombers blew them up in Northern Caucasus
During the period after May 15, 2009, when a suicide-bomber for the first time blew him up in Chechnya after cancellation of the counterterrorist operation (CTO) regime, and until today 20 terror acts have been committed by 22 suicide-bombers in "hot" regions of Northern Caucasus - Chechnya, Ingushetia and Dagestan.