ISIS just took responsibility for the attack in Moscow this evening by posting a short notice on one of their telegram affiliated channels. This comes as no surprise to those in the national security circles. It would seem highly unlikely that Ukraine would be involved in something so dramatic right in downtown Moscow. And the United States warned earlier this month that there was a potential attack coming in Moscow in the coming weeks. ISIS is a friend of no one. An analyst have been making assessments that Moscow is a new target over the last couple of months as ISIS has strengthened in the caucuses and in the Eastern European theater over the last couple of years. Additionally, ISIS could have potentially worked with Chechen rebels to gain intelligence on where to best attack and how to do it most effectively. It'll be interesting to hear what President Putin will say over the next couple of days as he gathers his plans for a response.