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HAVANA, CUBA. FEBRUARY 12, 2016. Patriarch Kirill of Moscow and all Russia, leader of the Russian Orthodox Church, (L) and Pope Francis, leader of the Roman Catholic Church, talk during a meeting at Jose Marti International Airport in Havana, Cuba. Russian Orthodox Church Patriarchate Press Office/TASS (Photo by TASS\TASS via Getty Images)

HAVANA, CUBA. FEBRUARY 12, 2016. Patriarch Kirill of Moscow and all Russia, leader of the Russian Orthodox Church, (L) and Pope Francis, leader of the Roman Catholic Church, talk during a meeting at Jose Marti International Airport in Havana, Cuba. Russian Orthodox Church Patriarchate Press Office/TASS (Photo by TASS\TASS via Getty Images)