Utility workers walk past a destroyed car in San Bruno, Calif., Tuesday, Sept. 14, 2010 where a pipeline exploded on Thursday. The tragic explosion of a gas pipeline has shed light on a problem ... more 
Utility workers walk past a destroyed car in San Bruno, Calif., Tuesday, Sept. 14, 2010 where a pipeline exploded on Thursday. The tragic explosion of a gas pipeline has shed light on a problem usually kept underground. Communities have expanded over pipes built decades earlier when no one lived there. Utilities have been under pressure for years to better inspect and replace aging gas pipes, many of them laid years before sprawling communities were erected around them, that now are at risk of leaking or erupting. less 
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Associated Press | Photo By Paul Sakuma
Sat, Sep 18, 2010 12:17 AM EDT