At a Board of Supervisors Committee hearing Thursday, PGE officials were questioned over apparent lapses before a massive fire and blackout at a San Francisco substation last year. That incident left 130,000 people in the dark on Dec. 20. Last week, an independent review suggested it was sparked by condensation and dust build-up on equipment inside the mission substation, leading to short circuiting.  Senior Investigator Jaxon Van Derbeken was at the meeting. He has the full report in the video player above. ...read more read less