Pope Francis leads an evening prayer service at St. Patrick’s Cathedral in New York.

The pope smiles at well-wishers while arriving to lead Thursday’s evening prayer session at St. Patrick’s Cathedral.

Pope Francis kisses Maria Teresa Heyer, a first-grade student from Brooklyn, he is greeted by Heyer and other students who gave him gifts when he arrived Thursday at John F. Kennedy International Airport in New York.

Francis waves to the crowd as he arrives at St. Patrick’s Cathedral, with Gov. Andrew Cuomo, left, and Sen. Charles Schumer, D-N.Y., waiting to greet him.

Pope Francis waves to a crowd along with Cardinal Timothy Dolan, left, as he rides down Fifth Avenue in the popemobile on his way to St. Patrick’s Cathedral.

With cameras ready, the audience awaits the entrance of Pope Francis at St. Patrick’s Cathedral in New York.

Pope Francis addresses a joint meeting of Congress on Capitol Hill in Washington. Listening behind the pope are Vice President Joe Biden and House Speaker John Boehner of Ohio.

Pope Francis addresses a joint meeting of the U.S. Congress in the House of Representatives Chamber on Capitol Hill.

Pope Francis looks out at members of the U.S. Congress as he receives a standing ovation at the conclusion of his address on Capitol Hill Thursday.

U.S. Sen. Elizabeth Warren, upper left, takes a picture of Pope Francis as he departs after addressing Congress.