Starting September 22, Pope Francis began a six-day trip to Washington, New York, and Philadelphia. Welcomed by President Obama, it's the first time in nearly 50 years that a pope has been on U.S. soil.

Often called "the people's pope," Pope Francis will speak on a number of economic, social, and environmental issues and will be meeting with American members of the Catholic Church throughout his trip. Pope Francis also made history on Wednesday afternoon by canonizing the controversial 18th-century Spanish monk Junipero Serra, the first canonization performed on U.S. soil. 

Pope Francis steps off an airplane after arriving from Cuba at Joint Base Andrews, Maryland. (Pool AFP/Getty)
Pope Francis is greeted by President Barack Obama, First Lady Michelle Obama, and invited guests after the his arrival from Cuba. (Pool AFP/Getty)
Pope Francis is greeted by President Barack Obama, Vice President Joe Biden, Jill Biden, and invited guests after his arrival from Cuba. (Pool AFP/Getty)
Pope Francis waves from the back of his Fiat after arriving from Cuba at Joint Base Andrews, Maryland. (Chip Somodevilla AFP/Getty)
President Barack Obama shakes hands with Pope Francis during the arrival ceremony at the White House. (Win McNamee/Getty Images)
President Barack Obama, First Lady Michelle Obama, and Pope Francis wave during an arrival ceremony on the South Lawn of the White House. (JIM WATSON/AFP/Getty Images)
Pope Francis and President Barack Obama stand for the national anthem of the Holy See during the arrival ceremony at the White House. (Alex Wong/Getty Images)
President Barack Obama and Pope Francis walk through the Colonnade on their way to a meeting in the Oval Office. (MANDEL NGAN/AFP/Getty Images)
President Barack Obama talks with Pope Francis during a meeting in the Oval Office of the White House. (MANDEL NGAN/AFP/Getty Images)
Pope Francis leans out of the Popemobile and gives a thumbs up to the crowd as he rides along a parade route around the National Mall in Washington, D.C. (Chip Somodevilla AFP/Getty)
Pope Francis embraces a little girl named Sophie after she broke security measures and ran toward him during a parade in Washington, D.C. (Anadolu Agency AFP/Getty)
Pope Francis arrives for the canonization Mass for Junipero Serra at the Basilica of the National Shrine of the Immaculate Conception. (Rob Carr/Getty Images)
Pope Francis arrives for the midday prayer service at the Cathedral of St. Matthew on September 23, 2015, in Washington, D.C. (Mark Wilson/Getty Images)
Pope Francis gestures to his watch to apologize for not being able to greet everyone at the end of a midday prayer with American bishops at the Cathedral of St. Matthew the Apostle. (NICHOLAS KAMM/AFP/Getty Images)
Pope Francis leaves the Basilica of the National Shrine of the Immaculate Conception to lead the Canonization Mass for Rev. Junípero Serra. (Andrew Caballero-Reynolds/AFP/Getty Images)
Pope Francis Celebrates the Mass of Canonization on the East Portico of the Basilica of the National Shrine of the Immaculate Conception, September 23, 2015. Junipero Serra was an 18th-century Spanish Franciscan friar who founded a mission in Baja, California, to bring Christianity to the indigenous population. (Rob Carr/Getty Images)
Pope Francis is applauded by members of Congress as he arrives to speak during a joint meeting. (Win McNamee AFP/Getty)
Vice President Joe Biden, center, and House Speaker John Boehner, right, applaud as Pope Francis arrives to speak a joint meeting of Congress. (Bloomberg AFP/Getty)
Pope Francis arrives with House and Senate leadership on the Speaker's Balcony after he delivered an address to a joint meeting of Congress. (Pool AFP/Getty)
Pope Francis waves to crowd from the Speaker's Balcony of the US Capitol building, after his address to a joint meeting of Congress. (Evy Mages AFP/Getty)
Pope Francis arrives at St. Patrick's Catholic Church in Washington, DC. (Pool AFP/Getty)
Pope Francis greets well-wishers at the Apostolic Nunciature to the United States upon returning from his trip to Capitol Hill. (MOLLY RILEY/AFP/Getty Images)

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