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Falcone, one of the 50 MTA K-9 units,
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Falcone, one of the 50 MTA K-9 units, reacts after finding an explosives odor used during a training exercise in a train car at Grand Central Terminal in Manhattan. (March 1, 2013)(Credit: Rory Glaeseman)

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The MTA K-9 unit

There are 50 K-9 units in the Metropolitan Transportation Authority Police Department, making it the largest mass transit K-9 unit in the country. (March 1, 2013)

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