Yet more problems for San Onofre: According to Southern California Edison, a possible case of sabotage at the San Onofre Nuclear Power Plant is being investigated. Gundersen and KH discuss how coolant liquid at the plant may have found its way into an unrelated system and threatened the backup power supply. - San Onofre has a long history of employee concerns, and recent layoffs may have exacerbated their employee problems. - The nation's oldest running Nuclear Plant, Oyster Creek, may remain shut down for longer than expected following the discovery of a crack in the reactor head. - The NRC to back a new study which will re-evaluate earthquake risks and probabilities at U.S. nuclear plants.