The City of New York Police December 20, 2014 challenge coin is a commemorative piece that honors the members of the New York City Police Department (NYPD) and marks a significant moment in the department’s history. December 20, 2014, holds particular meaning due to the tragic deaths of NYPD Officers Rafael Ramos and Wenjian Liu, who were killed in an ambush while sitting in their patrol car in Brooklyn. The coin was issued to honor the bravery and sacrifice of these two officers, as well as to acknowledge the unwavering service of the NYPD in the face of adversity.