Pete Dietrich, chief nuclear officer at San Onofre, assured in a news conference this week that San Onofre is super safe. The twin reactors are encased in inner shells of steel that are 8 inches thick and outer shells of concrete that are 4 feet thick. However, there's an old saying in the news business: "If your mother tells you she loves you, check it out." I've ridden my bicycle past the San Onofre Nuclear Generating Station a dozen times. In my mind's eye, there are gaps in the wall around the plant. Could a massive tsunami circle around the...