PHILADELPHIA (CBS) — A friendly competition between the Philadelphia Police and Fire departments began on Tuesday.

The 32nd annual “Battle of the Badges” kicked off at City Hall.

The weight-loss competition runs 13-weeks.

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The winning department receives a trophy and Weight Watchers will make a $10,000 donation in the winner’s name to the Hero Thrill Show.

The fire department won last year’s competition and leads the series 16 to 15.