articles on the subject. NYPD The New York City Police Department Emergency Service Unit is the largest ESU with over 500 personnel. ESU and the Canine Unit provide specialized equipment, expertise and support to the various units within the New York City Police Department. From auto accidents to building collapses to hostage situations, "ESU" officers are called on when the situation requires advanced equipment and expertise. The Canine Unit provides assistance during searches for missing persons, perpetrators and evidence. Fourteen of the twenty-three NYPD officers who died on September 11th, 2001 were from ESU. PAPD The Port Authority of New York and New Jersey Police Department Emergency Services Unit was founded in 1983, over the objections of the Port Authority Police management at that time. Working with the non-police PATH railroad personnel and railroad management, who clearly recognized the need for a rapid response to PATH railroad emergencies and fires, a small group of Port Authority Police officers assigned to the PATH command asked for, and got, a stock Port Authority utility truck which was converted for police emergency use. Despite the continued objections of Port Authority police management, the PATH railroad management's goal of having an "Emergency Response Vehicle" operated by the police bore fruit. The initial team members were trained in underground rescue, extrication of passengers from PATH train cars and first aid, with emphasis on the procedure of lifting railroad cars from trapped persons by use of Vetter air bags. Prior to the PATH Emergency Unit, emergencies which occurred on the PATH train were handled by the local police within the jurisdictions around the PATH train (Jersey City, New York, Newark, etc.). Emergency Services Unit members, who have received specialized training to respond to emergency and rescue operations that arise at Port Authority facilities or in other jurisdictions when their expertise is requested are currently assigned to various facilities throughout the Port Authority. Emergency Services Unit members may receive training in animal control, hazardous material response, heavy weapon use, bridge and water rescue, and tactical operations. Noteworthy cases that the Emergency Services Unit has handled or assisted other jurisdictions in handling include: The collapse of the World Trade Center on September 11, 2001 The 1993 World Trade Center bombing The rescue of an emotionally disturbed person from a water tower in West New York, New Jersey A 1999 General Aviation crash in the City of Newark The