#TransitTrivia: In the 1973 film “Serpico,” Al Pacino plays #NYC police officer Frank Serpico. In this scene, Serpico and his friend Bob Blair (Tony Roberts) are waiting for the #NYCsubway, while Blair struggles to get a potato chip vending machine on the platform to dispense its snacks. Although many films that take place on the subway are filmed at decommissioned stations dressed up to look like other stations, this scene was actually filmed on site within the active system. Can you identify w