U.S. Defense Secretary Robert M. Gates (left) talks with the Saudi Arabian assistant minister of defense and aviation, Prince Khalid bin Sultan, during a ceremony after Mr. Gates' arrival in Riyad, Saudi Arabia, on Wednesday, April 6, 2011. Mr. Gates arrived in the Saudi capital Wednesday for talks with King Abdullah on coping with the political upheaval sweeping the Arab world. (AP Photo/Chip Somodevilla, Pool)
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