Moscow attack shows ISIS's deadly reach. Branches of the Islamic State are gaining strength - worldwide.

Friday's bloodbath at a Moscow concert hall is just the latest evidence of how effectively Baghdadi's brutal vision is being implemented. ISIS-K, the most operationally focused group, is rapidly evolving by setting up cells and searching for recruits across Central Asia. The group has sent terrorists to Russia, Iran and Turkey and is also planning attacks against Western countries, including the United States, according to U.S. intelligence reports.