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As the goliath of the U.S. public safety radio market, Motorola wields a playbook full of tactics for fending off challenges to its estimated 80 percent share of a multibillion-dollar-a-year market. But a McClatchy investigation found that those tools often aren't needed. Some of the different radio systems available to public safety agencies on November 30, 2013. At front center is the Motorola APX 6000.