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Pope Francis drinks from a mate gourd, a traditional South American cup, he was offered as he arrives for his weekly general audience, in Saint Peter’s Square, at the Vatican, May 20, 2015. (Credit: AP Photo/Andrew Medichini)

Pope Francis drinks from a mate gourd, a traditional South American cup, he was offered as he arrives for his weekly general audience, in Saint Peter's Square, at the Vatican, May 20, 2015. (Credit: AP Photo/Andrew Medichini)