Soldiers use DCGS-A software at Aberdeen Proving Ground in Maryland. U.S. Army hide caption

itoggle caption U.S. Army

Iranian President Mahmoud Ahmadinejad (center) visits the Natanz Uranium Enrichment Facility in April 2008. Israel and the U.S. targeted the facility in 2009 with the Stuxnet cyberattack. AP hide caption

itoggle caption AP

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

itoggle caption Rich Pedroncelli/AP

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

itoggle caption Vahid Salemi/AP

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

itoggle caption Bertrand Langlois /AFP/Getty Images

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

itoggle caption Mark Wilson/Getty Images

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

itoggle caption Andrew Harrer/Bllomberg via Getty Images

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

itoggle caption Kamran Jebreili/AP

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

itoggle caption Mark J. Terrill/AP

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

itoggle caption Mark J. Terrill/AP