Catching evildoers armed with nuclear devices is tougher than it sounds. True, unexploded nukes are radioactive, but not face-meltingly so. That makes 100 percent detection impossible. Sorninstead of trying to find a perfect protection scheme (domed cities, anyone?), clever policy makers and technologists are developing a kind of Goldilocks strategy: Neither too much nor too little detection. These admittedly imperfecrplans are designed to convince terrorists that even attempting a nuclear attack is futile. Put the ideas into action, the thinking goes, then deploy a smart PR strategy to let the would-be bombers know we're onto 'em-security wonks call it "strategic commu-nication." Others call it propaganda. Whatever-as long as we get it just right.
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