US President Barack Obama greets Pope Francis upon his arrival at Joint Base Andrews outside Washington DC, USA, 22 September 2015. Pope Francis is on a five-day trip to the USA, which includes stops in Washington DC, New York and Philadelphia, after a three-day stay in Cuba. Pope Francis added the Cuba visit after helping broker a historic rapprochement between Washington and Havana that ended a diplomatic freeze of more than 50 yearsOlivier Douliery / POOL / EPA
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