THIS STORY HAS BEEN FORMATTED FOR EASY PRINTING

'If you don't find it often, you often don't find it.'

By Carey Goldberg
Globe Staff / May 31, 2005

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In findings that highlight the difficulty of making air travel safer, researchers at Brigham and Women's Hospital report that when the target of a visual search -- like a gun or a knife -- occurs only rarely, it is likelier to escape notice. (Full article: 875 words)

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