SAN BRUNO, Calif. - The city of San Bruno is marking a painful part of its past. 15 years ago, a ruptured Pacific Gas and Electric pipeline sparked a deadly explosion and fire that destroyed an entire neighborhood.

Marking a painful memory

What we know:

While the community is taking time to reflect on that day – September 9, 2010 – they're also continuing to heal.

On Tuesday, flags were lowered to mark the annual remembrance of the worst public utility disaster in American history.

"I was stretching and looked up into the sky and the next thing I noticed and heard, was just the loudest, hugest explosion," said Rick Silverman, a San Bruno resident and witness who was reflecting on that day.

Scanner traffic was broadcasting numerous 911 calls of some type of explosion on Tehama Cou

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