but insert a stop in cuba, a cameo before u.s. congress and a speech at the u.n. and the visit could create a trinity of tension. first, havana where the vatican's influence helped ease 60-plus years of cold war animosity between the u.s. and cuba. >> there is a checkered and complicated past, but that's the past. and the pope is about living in the present. and moving forward. >> during president raul castro's vatican meeting with francis earlier this year, the communist leader said he plans to attend every mass celebrated by francis. with castro in the pews, will the pope score in the country's history of human rights violation and lack of religious freedom. pope francis told students in cuba thursday through video conference he'd like to see friendship between the u.s. and castro's communist nation saying, [ speaking spanish ] >> translator: one of the most