This photo released by the Kenya presidency shows the collapsed upper car park of the Westgate Mall in Nairobi last week after al-Shabab terrorists attacked with explosives and guns, killing more than 60 people. Kenya Presidency via AP hide caption

itoggle caption Kenya Presidency via AP

Edward Snowden's leaks about the NSA's secret surveillance program have pushed the agency to expedite planned reforms ahead of schedule, according to NSA officials. Maxim Shemetov/Reuters/Landov hide caption

itoggle caption Maxim Shemetov/Reuters/Landov

Government officials tell NPR that Edward Snowden's job responsibilities allowed him to copy sensitive files unnoticed. Maxim Shemetov/Reuters /Landov hide caption

itoggle caption Maxim Shemetov/Reuters /Landov

With the possibility of a strike on Syrian targets, U.S. firms are trying to protect themselves from cyberattacks that may follow. hide caption

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Part of the Robert Moses Niagara Power Plant in Lewiston, N.Y., is seen from the air on Aug. 14, 2003, during a massive power outage that stretched from New York to Detroit and into Canada. David Duprey /AP hide caption

itoggle caption David Duprey /AP

Protesters demonstrate against alleged NSA surveillance in Germany during a rally in Hannover, Germany, on Saturday. Peter Steffen/AP hide caption

itoggle caption Peter Steffen/AP