correspondent dan rivers joins us now from rome. he is just down the street from the vatican. dan, the cardinals begin voting on tuesday. what is the likelihood that they'll pick a new pope right away, that it may take a day or two, or will it take longer, do you think? >> reporter: the honest answer is, no one knows. back in '92 it took five days. subsequent conclaves where they've voted for a pope are shorter. some three days. no one knows. i think it's highly unlikely given that there's no obvious front-runner that the new pope will be chosen on tuesday. i'm guessing it will be wednesday, thursday, friday. no one knows for sure. today is the last day when the cardinals who are potentially going to be the vote or vote for the pope will be out giving mass in their various churches that they're affiliated to in rome. this church behind me, beautiful church just down the road from vatican is santa maria dell