An image taken from fired police sergeant Ron King's video statement, in which he defends himself for bringing silhouette targets resembling the hoody-wearing image of Trayvon Martin. YouTube hide caption

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YouTube

A mine worker sings and dances during a gathering at the Lonmin Platinum Mine near Rustenburg, South Africa, on Wednesday. Some 270 miners were charged with murder Thursday in connection with the deaths of 34 of their striking colleagues. Themba Hadebe/AP hide caption

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Themba Hadebe/AP

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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Sean Locke/iStockphoto

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

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Kimihiro Hoshino/AFP/Getty Images