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Los Angeles Local News, Weather, and TrafficDetails of 'Operation Independence' are top secret. [Well, until the drill goes live.] 03 Jul 2013 The Los Angeles County Sheriff's Department, working with the Department of Homeland Security, has planned one of its biggest drills and deployments of the year to coincide with the Fourth of July. Starting today, throughout the county, those who use public transportation will see more deputies than usual. At Union Station this morning, there are hundreds of them already.