David McNew/Getty Images
A couple stands near the San Onofre Nuclear Generating Station at San Onofre State Beach on March 15, 2012 south of San Clemente, California. Plant operator Southern California Edison has applied to the Nuclear Regulatory Commission to restart one of the two reactor units, at 70 percent of power for a limited time. The nuclear plant has been shut down a leak in generator tubes sent a small amount of radioactive steam into the atmosphere on January 31, 2012. (Photo by David McNew/Getty Images)
Senator Barbara Boxer is asking the Justice Department to investigate whether Southern California Edison lied to regulators and the public about the San Onofre nuclear plant. Boxer says she has a letter proving the utility knew about potential problems at the plant back in 2004.
KPCC's Ben Bergman has been following this story for months, and joins us now with more.