peculiar content of the letter and that provides some kind of lead for investigators, though it doesn't tell you and i as lay people a whole lot. i can add for you that the white house has a very broad perimeter around it and in doubt i imagine that has something to do with both boston and this letter. >> jessica, the letter, as i recall, that was sent to senator wicker, was mailed from memphis or post marked from memphis, tennessee. do we know if the same letter that was sent to the white house was also post marked from memphis? >> reporter: nair not explicitly saying that but say they're very similar and they have the same -- i mean, they have the same language and contents. so you can only conclude that, yes, if you're a logical person, you have to conclude they come from the same source, they're they're not saying that it was, they didn't draw that conclusion for us.