and that needs to be optimized and that's what the pope is all about. his security can be optimized around his activities. >> so you don't ever tell the pope, sir, you cannot do that? >> no. so what is the most dangerous threat to a pope? well, andreas widmer usually says it's someone mentally ill approaching the pope trying to enact some scenario in their mind. you have to protect the pope. you have to protect everyone in the area but you have to protect that assailant from him or herself, wolf. >> sometimes when a president makes an impromptu venture into a side crowd, it's not always the most dangerous situation, right? >> that's right. sometimes when a pope ventures into a crowd like that, of course it's not scripted. nobody really knows it beforehand. and andreas widmer and some of the secret service people we talked to say it's not always that dangerous because even though the security detail doesn't know he'll do it