Pope Francis may have kickstarted a process of re-establishing diplomatic relations between Cuba and the United States more than a year ago, but this Pope has no intention of leaving well enough alone.

WASHINGTON - Pope Francis introduced himself to President Barack Obama and all people of the United States as a "son of an immigrant family" arriving in the United States for the first time to learn from others and to share from his own experience.

WASHINGTON - With cellphone cameras held high and cheers of delight, an enthusiastic and disparate crowd of hundreds gathered outside the Vatican Embassy Sept. 22 to welcome Pope Francis to the United States.

WASHINGTON - Pope Francis touched down in Washington on Sept. 22 after a historic visit to Cuba, the first Latin American Pope in history on his first trip to the United States. He comes “as a migrant,” as a top papal aide put it, on a six-day visit filled with great expectations for the popular pontiff but also numerous challenges.

ABOARD THE PAPAL FLIGHT FROM CUBA - Pope Francis defended his position on the economy, the environment and other social issues as faithful repetitions of the basic Catholic social doctrine.

SANTIAGO, Cuba - Pope Francis ended his trip to Cuba by blessing the city of Santiago de Cuba and telling Cubans to treat family as an "opportunity" rather than a problem.

SANTIAGO, Cuba - Pope Francis called Cuban to a "revolution of tenderness" as he celebrated Mass in the Minor Basilica of the Shrine of Our Lady of Charity of El Cobre, the country's patroness.

SANTIAGO, Cuba - In one of the calmer, more intimate moments of his visit to Cuba, Pope Francis and the country's bishops offered special prayers to the Cuba's patroness, Our Lady of Charity of El Cobre.

Pope Francis has been presiding over Mass at the Sanctuary of Our Lady of Charity of El Cobre, Tuesday in Santiago. In his Homily, the Holy Father returned to the theme of  “serving others” recalling the exemplary model of Our Lady, who the Pope said, “left her house and went out to serve.”

SANTIAGO, Cuba - A key task of a traveling pope is to confirm his brothers and sisters in the faith. For Pope Francis in Cuba, that ministry took on added importance as Cuba and its people stand on the threshold of potentially epochal change.

HOLGUIN, Cuba - The scene would have been unimaginable a few years ago: A Catholic Mass in Holguin's Revolution Plaza, where May Day parades and other patriotic events exalting the Cuban Revolution take place.

VATICAN CITY - While cruising past cheering crowds in Naples, Italy, earlier this year, Pope Francis received an unexpected gift. A local pizzeria owner jogging alongside the papal car jumped over the barrier and handed Francis a pizza, which the smiling pope willingly accepted.

HAVANA - In a hot and steamy cathedral after listening to a Daughter of Charity talk about her work with people with severe disabilities, Pope Francis set aside his prepared homily and spoke about serving those the world considers "useless."

VATICAN CITY - Pope Francis expressed his joy and "prayerful solidarity" to the new head of the Assyrian Church of the East, 73-year-old Catholicos Gewargis III.

On the first full day of his Apostolic Journey to Cuba, Pope Francis celebrated the Sunday Mass in Havana's Plaza de la Revolución, focusing on the theme of service.