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12 of 56: With the BART transit system on strike, the Embarcadero Station is closed and nearly empty Friday, Oct. 18, 2013, in San Francisco. Commuters in the San Francisco Bay Area got up before dawn on Friday and endured heavy traffic on roadways, as workers for the region's largest transit system walked off the job for the second time in four months. About 400,000 riders take BART every weekday on the nation's fifth-largest commuter rail system. ( (AP Photo/Eric Risberg))

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