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If you celebrate Christmas, you may have found some presents under the tree, and you may believe those mysterious presents came from a jolly old man in a red suit.

He has a lot of names, including Santa Claus, Kris Kringle, Sinterklaas, Noel Baba, Popo Gigio — and of course — St. Nicholas. But believe it or not, St. Nicholas was a real man. He was a bishop, living in the 3rd century, in what's now modern-day Turkey.

People joke that it's customary for non-Christians to eat Christmas dinner at Chinese restaurants. But a Jewish community in Detroit is offering an alternative. They work with Muslims to volunteer for nearly 40 projects around the city. Guest host Celeste Headlee talks with organizers Micki Grossman and Dr. Muzammil Ahmed, about "Mitzvah Day."

Motown legend Marvin Gaye composed the soundtrack for the film, Trouble Man. Critics say it's one of his finest works. To mark the film's 40th anniversary, Universal Music released a special edition album. In an encore presentation, guest host Celeste Headlee speaks with saxophonist Trevor Lawrence and director Cameron Crowe.

Sharon Morgan is a black descendant of American slaves. Thomas Norman DeWolf is a white descendant of a famous slave-trading family. The two travelled together for three years to track the roots of racism. They talk with guest host Celeste Headlee about their journey, chronicled in the book, Gather at the Table.