Pope Francis is on a historic visit to three US cities in six days. The world leader of the Roman Catholic Church has already visited the White House and addressed a joint session of Congress. Francis will also spread his message in New York City and conclude his trip in Philadelphia this Sunday with a Mass at the World Meeting of Families.

By Lloyd Young

Pope Francis speaks during a multi-religious prayer for peace at the 9/11 Memorial and Museum on Sept. 25 in New York. Pope Francis is in New York on a two day visit and will carry out a number of engagements including a Papal motorcade through Central Park and a Mass in Madison Square Garden.

(Justin Sullivan/pool photo Getty Images)