>> yeah, i think that's the logic. go back to the united states, kill as many people as you can. the two brothers think boston marathon, times square, it doesn't really matter. you know what they don't want is be connected by cell phone to foreign cell groups. they don't want money transfers. and they don't want orders coming from orr seas because it's all intercepted. just go and kill as many people as you can. this is why this discussion about hitting new york or other targets in boston seem very fluid to us. it doesn't sound very military. but in that world of trying to hide what they're doing, it makes sense. >> juliette, unless there's cooperation from russian authorities and unless russian authorities were actively monitoring tamerlan tsarnaev when he was over there for six months, it's very positive we may never be able to piece together that full six-month timeline. >> right, there might be a lot of unanswered questions for a while.