The Obama administration on Friday asserted a bold and broad power to collect the phone records of millions of Americans to search for a nugget of information that might thwart a terrorist attack. In a 22-page white paper, the Department of Justice for the ...

The U.S. government had a problem: Spying in the digital age required access to the fiber-optic cables traversing the world’s oceans, carrying torrents of data at the speed of light. And one of the biggest operators of those cables was being sold to an ...

The ability of contractor-turned-fugitive Edward Snowden to evade arrest is raising new concerns among U.S. officials about the security of top-secret documents he is believed to have in his possession — and about the possibility that he could willingly share them with those who ...

The faces of more than 120 million people are in searchable photo databases that state officials assembled to prevent driver’s license fraud but that increasingly are used by police to identify suspects, accomplices and even innocent bystanders in a wide range of criminal investigations. ...

Opening the court-martial of U.S. Army Pfc. Bradley Manning, a military prosecutor charged Monday that he “harvested” a massive trove of classified information from secure networks and made it available to America’s enemies by dumping it onto the Internet. In a nearly hourlong statement ...

Designs for many of America's most sensitive advanced weapons systems have been compromised by Chinese hackers, according to a report prepared for the Pentagon.