Sleepy police were likelier to fall asleep while driving, a new survey of nearly 5,000 officers in the U.S. and Canada finds. About 40 percent of officers surveyed reported sleep disorders, with various health implications. Sean Locke/iStockphoto hide caption

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Occupy Oakland protesters set trash on fire to make a barricade as police officers form a line to disperse them on Nov. 3., in Oakland, Calif. Kimihiro Hoshino/AFP/Getty Images hide caption

itoggle caption Kimihiro Hoshino/AFP/Getty Images