GWEN IFILL:

It's not yet clear what issues Pope Francis will directly address during his visit here, but one problem casts a long shadow for the church: sexual abuse scandals.

This pope has pressured top church officials to end abuse involving priests. Just this year, the bishops of Saint Paul-Minneapolis and Kansas city have resigned in the wake of new revelations.

As part of our special coverage of the pope's visit this week, special correspondent Chris Bury reports on how sex abuse by clergy still haunts American Catholics.