Inspectors from the International Atomic Energy Agency are scheduled to visit Iran's heavy-water reactor in the city of Arak on Sunday as part of an international deal on the country's nuclear program. Hamid Forutan/EPA/Landov hide caption

itoggle caption Hamid Forutan/EPA/Landov

Google and five other companies sent a letter last month to members of the Senate Judiciary Committee supporting legislation to reform NSA surveillance programs. Marcio Jose Sanchez/AP hide caption

itoggle caption Marcio Jose Sanchez/AP

Gen. Keith Alexander is director of the National Security Agency, whose duty, his office has said, "requires us to attempt to collect terrorist communications wherever they traverse global infrastructure." Evan Vucci/AP hide caption

itoggle caption Evan Vucci/AP