The San Onofre Nuclear Generating Station is seen from the beach along San Onofre State Beach on March 15, 2012 south of San Clemente, California.
The Southern California Edison has decided to shut down its San Onofre Nuclear Power plant permanently. We speak with Alison St. John of KPBS in San Diego, who explains why the decision was made -- and what it means for the state's power supply. She's been following the drama surrounding the plant ever since it first shut down a year and a half ago. Reporter: Alison St. John