FILE - Commuters enter and exit a Bay Area Rapid Transit station in San Francisco's financial district in this Sept. 15, 1997 file photo. Officials with the Bay Area Rapid Transit system, better known... more 
FILE - Commuters enter and exit a Bay Area Rapid Transit station in San Francisco's financial district in this Sept. 15, 1997 file photo. Officials with the Bay Area Rapid Transit system, better known as BART, said Friday Aug. 12, 2011 that they blocked cellphone reception in San Francisco train stations for three hours to disrupt planned demonstrations over a police shooting. (AP Photo/Robin Weiner, File) less 
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Associated Press | Photo By Robin Weiner, File
Sat, Aug 13, 2011 3:28 AM EDT