Disaster_Accident

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FILE - In this Sept. 9, 2010, file photo, a massive fire roars through a mostly residential neighborhood in San Bruno, Calif. Pacific Gas & Electric Co. pleaded not guilty Monday, April 21, 2014, to a dozen felony charges stemming from alleged safety violations in a deadly 2010 natural gas pipeline explosion that leveled a suburban neighborhood in the San Francisco Bay Area. As survivors of the blast looked on, attorneys for California's largest utility entered the plea in federal court in San Francisco to 12 felony violations of federal pipeline safety laws. (AP Photo/Paul Sakuma, File)