PHOTOS: CIA Director David Petraeus quits

9 of 10: The head of U.S. Central Command Gen. David Petraeus, left, shakes hands with Italian premier Silvio Berlusconi at Palazzo Chigi Government office, in Rome, Tuesday, Dec. 9, 2008. The 20,000 additional troops sought by American commanders for the NATO mission in Afghanistan would come from the United States, with any additional boost supplied by allies, the U.S. general who oversees the Afghan war said Tuesday. (AP Photo/Alessandra Tarantino) (AP Photo)

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