Who else might be watching? Britain's spies collected millions of images from video chats, according to the latest secrets spilled by NSA leaker Edward Snowden. Paul Sakuma/AP hide caption

itoggle caption Paul Sakuma/AP

A ceremony is held to mark a new patrol vessel in service for China's marine surveillance in Zhoushan, east China's Zhejiang Province, last month. Shen Lei/Xinhua/Landov hide caption

itoggle caption Shen Lei/Xinhua/Landov

Glenn Greenwald, left, and David Miranda after Miranda's arrival at Rio de Janeiro's International Airport on Aug. 19, 2013. Miranda had been detained for nine hours at London's Heathrow Airport. Authorities questioned him about Greenwald's reporting of the "NSA leaks." Ricardo Moraes /Reuters/Landov hide caption

itoggle caption Ricardo Moraes /Reuters/Landov

Ben Wizner (left) and Daniel Ellsberg argue in favor of the motion "Edward Snowden Was Justified" in an Intelligence Squared U.S. debate on Feb. 12. Samuel LaHoz/Intelligence Squared U.S. hide caption

itoggle caption Samuel LaHoz/Intelligence Squared U.S.

A North Korean KN-08 intercontinental ballistic missile rolls past in a military parade in Pyongyang in July to mark the 60th anniversary of the Korean War armistice. A team of U.S. researchers recently found the buildings where the North Korean military is believed to be assembling the launchers. David Guttenfelder/AP hide caption

itoggle caption David Guttenfelder/AP