National Transportation Safety Board Chair Deborah Hersman, right, and U.S. Rep. Jackie Speier, D-San Mateo, walk past an area where a ruptured gas line caused a deadly pipeline explosion nearly nine ... more 
National Transportation Safety Board Chair Deborah Hersman, right, and U.S. Rep. Jackie Speier, D-San Mateo, walk past an area where a ruptured gas line caused a deadly pipeline explosion nearly nine months ago, in San Bruno, Calif., Wednesday, June 8, 2011. Officials are still probing the cause of the explosion, which engulfed a San Bruno neighborhood and killed eight people, injured dozens, and destroyed 38 homes. (AP Photo/Darryl Bush) less 
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Associated Press | Photo By Darryl Bush
Wed, Jun 8, 2011 5:19 PM EDT