coverage of breaking news out of paris, france, where 120 people have been killed, 200 injured in multiple attacks. i want to bring in our msnbc editor of our discovery desk, cal perry. we re talking about this 12 hours after this attack, what you call a window or group cl m claiming responsibility for this attack. you ve seen some out there online, whether that is valid or authentic is another thing. right. we re working with our partners at flash point to decipher where these are coming from and are they coming from what we know to be legitimate channels the islamic group has used in the past. just because they claim responsibility doesn t mean they participated in the attack. the evidence and clarification of the attack. a lot of groups want to jump and say they did this. this is about verifying it. how do you do that. some evidence left at the scene.