Cybersecurity experts say Iran has the resources necessary to be a major player in cyberwarfare. iStockphoto.com hide caption

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The group Anonymous has threatened to take down the Internet on Saturday to protest anti-piracy proposals that they consider online censorship. Here, a masked protester demonstrates against one such measure last month in Zagreb, Croatia, last month. Hrvoje Polan/AFP/Getty Images hide caption

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The Homeland Security Department's Control System Security Program facilities in Idaho Falls, Idaho, are intended to protect the nation's power grid, water and communications systems. U.S. security officials and members of Congress are convinced a new law may be needed to promote improved cyberdefenses at critical facilities. Mark J. Terrill/AP hide caption

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Iranian President Mahmoud Ahmadinejad visits the Natanz uranium enrichment facility in April 2008. Western governments suspect Iran is seeking nuclear weapons, a charge Tehran denies. How to handle the possible threat from a nuclear-armed Iran is a major foreign policy concern of the U.S. AP hide caption

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Mitt Romney campaigns with Puerto Rican Gov. Luis Fortuno at Lanco Paint Co. in Orlando, Fla., last month. The Puerto Rico's March 18 primary could be a significant source of delegates for the GOP candidates. Charles Dharapak/AP hide caption

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Staff members use computers at a press center in Beijing. Security experts say hacking of U.S. computers from China is becoming an increasing problem. Greg Baker/AP hide caption

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FBI Director Robert Mueller, Director of National Intelligence James Clapper and CIA Director David Petraeus appear before the Senate Select Committee on Intelligence on Capitol Hill on Tuesday. Win McNamee/Getty Images hide caption

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Fishing boats are seen in front of oil tankers on the Persian Gulf waters, south of the Strait of Hormuz. The European Union has announced plans to join U.S. efforts to slow the flow of oil from Iran, the world's third largest exporter. Kamran Jebreili/AP hide caption

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