Technology to filter photos in Web searches may help the Justice Department curb online trafficking in child pornography. The department has thus far focused its efforts on prosecution, not prevention. iStockphoto.com hide caption

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This image released by the Mexican federal police shows drug kingpin Edgar Valdez Villarreal, aka "the Barbie," a member of one of the country's top drug cartels, during his arrest Monday. HO/AFP/Getty Images/HO/AFP/Getty Images hide caption

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Former Illinois Gov. Rod Blagojevich was found guilty of lying to the FBI, making him the second consecutive Illinois governor to be convicted of a crime. John Gress/Getty Images hide caption

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