The Pentagon and the Energy Department have airlifted a small nuclear reactor from California to Utah.
Three years after San Onofre was closed, the debate is still active over what to do with the nuclear power plant's waste.
The California Coastal Commission on Tuesday approved the building of a nuclear waste storage facility near San Onofre.
Sirens went off several times between 10 a.m. and noon Wednesday in the San Onofre area, possibly the final drill from the San Onofre Nuclear Generation Station.
Southern California Edison says it will take 20 years and $4.4 billion to dismantle the San Onofre nuclear power plant.
The Fukushima nuclear power plant continues to spew radiation. ABC7's David Ono finds out whether we should be concerned.