Republican presidential candidate Mitt Romney meets with members of the Veterans of Foreign Wars after his speech at the VFW National Convention in Reno, Nev., on July 24. Rich Pedroncelli/AP hide caption

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Iranian workers make repairs to a unit at Tehran's oil refinery in November 2007. It's estimated that a Western oil embargo is costing Iran about $4.5 billion each month in lost revenue. Vahid Salemi/AP hide caption

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German Chancellor Angela Merkel talks with European Central Bank President Mario Draghi (left) and Italian Prime Minister Mario Monti (right) during a summit of European leaders in Brussels. They reached an agreement on a growth plan for the continent, and world markets surged. Bertrand Langlois /AFP/Getty Images hide caption

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James Clapper, director of national intelligence, leaves a closed-door joint meeting with the Senate and House Intelligence committees on June 7. Clapper ordered an inquiry into security leaks to be concluded next week. Mark Wilson/Getty Images hide caption

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The CIA took considerable heat over Iraq, where weapons of mass destruction weren't found. Now, as the agency assesses Iran, it invites an NPR correspondent to its headquarters for a rare chat about the issue. Andrew Harrer/Bllomberg via Getty Images hide caption

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If sanctions continue, Iran's tankers could fill up with surplus oil and leave the country with no place to store its continued production. Kamran Jebreili/AP hide caption

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Cybersecurity analysts work in the watch and warning center during the first tour of the government's secretive cyberdefense lab intended to protect the nation's power, water and chemical plants, electrical grid and other facilities on Sept. 29, 2011, in Idaho Falls, Idaho. Mark J. Terrill/AP hide caption

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A bill in Congress would task certain private businesses with increasing their cybersecurity to stave off attacks aimed at harming U.S. cyber infrastructure. Mark J. Terrill/AP hide caption

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

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