The New York Police Department released drone video that it says shows two teenagers at the back of a train attempting to subway surf. Police said officers responded quickly, stopping the train before it could depart. The footage, filmed Monday, comes days after two teenagers were found dead in what police are investigating as a subway surfing incident. At least three people have died in NYC subway surfing so far this year, and more than 120 people have been arrested for attempting to do so. | C