The revelation that Mr. Merah was already on the radar of French intelligence before his string of attacks leaves the president open to potential criticism.

WSJ: French Candidates Focus on Security

NATO's intervention in the Balkans, not to mention their utter dependence on America for things like electronic warfare, airborne radar and satellite intelligence, does anyone have to worry about Europe getting too big for its military boots?

ECONOMIST: The EU turns its attention from ploughshares to swords

"This was a long-term operation to steal intelligence and information that went under the radar, " he said.

BBC: How the New York Times cleaned house after its hack attack

Based on inputs ranging from radar data and current position to mission status and intelligence feeds, the system would divide the set of all possible actions into those that are ethical and those that are not.

ECONOMIST: Monitor

Photos, radar data, full-motion video and electronically gathered intelligence flows across multiple screens.

NPR: AP IMPACT: Combat Stress Felt Far From Front Lines

In the mid-1980s, American intelligence discovered a huge missile- detection and -tracking radar being built by the Soviet Union near the Western Siberian town of Krasnoyarsk.

CENTERFORSECURITYPOLICY: With Friends Like These....

The cars use a combination of technologies, including radar sensors on the front, video cameras aimed at the surrounding area, various other sensors and artificial-intelligence software that helps steer.

CNN: Self-driving cars now legal in California