And there is a lot that we just don't know. And that's why many say, hey, the Russians need to step up to the plate here and provide us better information.
I think they have information that would be incredibly helpful that they haven't provided yet. And I think...
STEPHANOPOULOS: Why wouldn't they have provided it?
ROGERS: You have to remember the FSB is a hostile service to the FBI and the CIA. There's a cultural problem there between where the Russians are and our folks. So they sent a letter, didn't have a lot of information, and then three extra times after the investigation was closed, they said, hey, do you have any more. They wouldn't do it.
I believe that they have information and had more information that they just weren't willing to...
STEPHANOPOULOS: One of things they have provided is these wiretaps of the brothers' mother, who she seems to have been a key figure at least in encouraging the older brother in his more fervent worship.
SCHAKOWSKY: The FBI are listening to those tapes thought at the time, at least, that it had more to do with internal Russian politics and not so much a threat to the United States of America.
But I don't really agree that we're not any closer, because this is one of the most broad investigations that we've seen. All of our law enforcement and intelligence community, doing a great job investigating and questioning all of the associations. Awlaki, the radical cleric, dead, but still have -- there's tapes.
STEPHANOPOULOS: They're looking at his tapes, right.
SCHAKOWSKY: They're looking at tapes.
And then there's personal issues that the -- that Tamerlan may have had, that...
STEPHANOPOULOS: But when you say you're closer, I mean to pick up on what the congressman was saying, this idea that there might have been other persons of interest, do you know of any other people here in the United States who might have been a part of this process of radicalizing Tamerlan?
RUPPERSBERGER: This is part of the investigation, this is a domestic investigation and it's an international investigation. And we're really god at this. The FBI is very good with that, working with our other agencies.
There are persons of interest in the United States.
We're looking at phone calls before and after the bombing, this type of investigation. But I agree with Mike, also, the real test about whether he was radicalized or not -- or where he was radicalized is Russia. And we have to do a lot of investigation in Russia, because when he went over to Russia and then came back, things changed, including his brother -- his younger brother.
RADDATZ: But it seems like he was partly radicalized here, as well. I mean, this started in 2009 and 2010 when people started talking about a real change in the older brother then he went over to Russia. And clearly something more happened and meeting with extremists and those wiretaps. And you have got to wonder why they wiretapped the mother to begin with.
GOLDBERG: But the tragic fact of the matter is you don't have to go to Russia to be radicalized, you don't have to go to Pakistan, or Afghanistan, you can do it right in your bed room on the internet. We've learned that.
Osama bin Laden is dead. His work and his ideas are carried on.