The environmental activist group Greenpeace wanted to be prepared to counter President Bush's visit last week to Pennsylvania to promote his nuclear energy policy. "This volatile and dangerous source of energy" is no answer to the country's energy needs, shouted a Greenpeace fact sheet, decrying the "threat" posed by the reactors Bush visited in Limerick. But after that assertion, the Greenpeace authors were apparently stumped while searching for the ideal menacing metaphor. "In the twenty years since the Chernobyl tragedy, the world's worst nuclear accident, there have been nearly [FILL IN ALARMIST AND ARMAGEDDONIST FACTOID HERE]," the sheet said. The...