A nun of ?the Missionaries of Charity lights candles on Mother Teresa's tomb prior to a special prayer service at Mother House in Kolkata on December 18, 2015.   Mother Teresa, set to become a saint after the Vatican announced recognition of her second miracle, became a global symbol of compassion for her care of the sick and destitute.  AFP PHOTO/ DIBYANGSHU SARKAR / AFP / DIBYANGSHU SARKAR
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