he may talk a bit about religion and american culture. it's interesting in the news lately we've heard the suggestion that a muslim can't be a good president of the united states. that's something people used to say about catholics. that's something people did say about john f. kennedy before he was elected and during his presidency. >> reporter: and what will be perhaps the most moving part of the morning, of pope francis will meet family members who lost family here. >> he was sweet and sincere. he was a really good brother, a really good son. >> reporter: john's sister plans to tell her pope about her brother and ask for a special prayer. >> i want to explain the extreme love that i have for my brother john, and i want to share that with him. and i also want him to pray for not only john and all the victims that died that day, but i want him to pray for myself and my family and all the families that lost loved ones that day because we're still