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The movement of people has become one of the most dominant, global issues of our time. In 2015 more than a million migrants and refugees crossed into Europe, sparking a continental crisis and creating divisions over how to with resettling people. The UN high commissioner for refugees, Filippo Grandi, spoke to Lawrence Pollard about what should be done to address this massive flow of people. (Photo: UNHCR Secretary General Filippo Grandi. Credit: FABRICE COFFRINI/AFP/Getty Images.)