do have an image of this person, are there plans to release that image to the public for the sake of publicizing who this person is? >> plans, no. they have thought about it. it cuts both ways, because if they think they can't make any progress in determining who it is, then they probably will release it, but probably will do that only when they think they have run out the string that they have, because releasing the picture causes all sorts of problems. it alerts the person that they are on to them, it also causes all sorts of calls that come in from people who will falsely say they think they know who it is. you know, that's the price of asking for public tips, you take the good with the bad. you know, it may come to that if they need to do that. it's certainly something they've thought about. >> i want to ask you, finally, about the ricin question. this has been this crazy sort of subsidiary story in the aftermaths of boston, a series of letters tested positive for ricin sent to federal officials, lawmakers, wicker, carl levin, the president himself. we have an arrest now i understand of a man named