suspect? did they look through their database about what they had on him, what they did not, and then when they got the photo on thursday night, were they able to -- were there efforts to match that photo up with whatever photos would have been in u.s. government databases both from the fbi and state department travel records because tsarnaev did take that six-month trip to russian in 2012. >> with your reporting, is there any indication as to the time when investigators became aware of this youtube account with these jihadist and sympathetic sort of sentiments being launched? you say that happened about three weeks after he returned in july of last year from being abroad for six months. did they know that then or -- >> this is the sort of -- >> i mean -- >> that's one of the questions -- that's one of the questions we don't know the answer to, and, remember, this raises all sorts of civil liberties issues. about how much monitoring the