Francis’ visit to the U.N. caps a series of recent diplomatic interventions, including serving as a mediator and guarantor during 18 months of secret negotiations between the United States and Cuba. The two countries resumed diplomatic relations in July, restoring official ties that were cut in 1961.

Americans are gung-ho for Pope Francis' U.S. visit — if they know he's coming. But most Americans (52 percent) and nearly a third of Catholics (31 percent) say they hadn't heard about the pope's September visit to Philadelphia, New York City and Washington, D.C., according to a new survey released Tuesday by the Public Religion Research Institute in partnership with Religion News Service.