NYPD
The New York City Police Department Emergency Service Unit is the largest ESU with over 300 personnel. ESU and the Canine Unit provide specialized equipment, expertise and support to the various units within the New York 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.
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