Zohran Mamdani officially took the oath of office as the clock struck midnight on New Year's Eve, becoming the 112th mayor of New York City. In a private ceremony at the abandoned Old City Hall subway station, Mamdani was sworn in by New York Attorney General Letitia James. The 34-year-old democratic socialist, who served in the 36th Assembly District representing the Queens neighborhood of Astoria, is now the city's first Muslim mayor and its first of South Asian descent. | CBS News