[Pope Francis waves as he leads his Sunday Angelus prayer in Saint Peter's square at the Vatican]Pope Francis called on Sunday for a united response to help flows of people into Europe fleeing war and suffering, as the region argues over sharing the burden of looking after them. Addressing crowds in St. Peter's Square at the Vatican, Francis, who decried the suffering of migrants at the border between Mexico and the United States this month, said the "refugee drama" was always in his prayers. Greece has been inundated with refugees and migrants after Balkan countries shut their borders and Austria restricted entry for the hundreds of thousands aiming for Europe, which is in the second year of its biggest migration crisis since World War Two.