long history of using false flags. if you look in syria where they would use minor chemical agents on their own forces or on asads forces and use this for a reason for chemical weapons, this could also be setting the stage for those types of attacks. that is a very real concern, particularly in the east and the donbas where russia can use the separatist elements as proxies and keep a little distance there in terms of what type of retaliation they then face in additional world condemnation. both can be true in this case. >> martha: i want to play an exchange that happened this afternoon between a reporter and jen psaki about what the response would be to a chemical weapons attack by russia in ukraine. watch this.