Analysis: Putin pledged decades ago to conquer the horrors of Islamic extremism. Deadly Dagestan attack again proves he failed

​ Only a fraction of the violence that raged across Dagestan on Sunday is visible at the moment, and it is already horrific. Co-ordinated attacks in Dagestan’s two main cities, hitting synagogues and churches. Reports a priest had his throat slit, hostages taken, and the sons of a local official and an MMA fighter among the five attackers. Read More Breaking News, Latest News and Videos | CNN