CNN The Situation Room January 7, 2015 22:50:00
>> peter, you studied terrorism for a long time. what does it say to this operation, who was responsible? >> we don't know, but it's important to recognize a lot of americans watching the show we would think americans could never do this. we've had two american citizens who also planned and attacked and killed cartoonist in america and we had two other american terrorists who incited murders because they had a show with the prophet mohammed being lampooned. so we've had four american citizens who have done forms of this already. >> jane you've seen probably that 2013 ad run in al qaeda paper, ...
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