The Brussels attacks have pushed security to the forefront of Britain's EU referendum campaign this week, as intelligence experts came out of the shadows to press the benefits and disadvantages of membership.
The White House said Wednesday it had adopted new procedures on President Barack Obama's foreign trips to avoid a repeat of the "inadvertent" release of the name of the CIA's station chief in Kabul last month.
Fugitive self-proclaimed spy Edward Snowden said Wednesday he wants to return home, as he defended his massive leak of US intelligence secrets, saying abuses of constitutional rights left him no choice.
The US government must turn over information on secret CIA interrogation centers connected to the trial of the alleged mastermind of the 2000 USS Cole bombing, a military judge said in an order released in full Tuesday.
President Barack Obama presents Americans on Friday with long-awaited reforms of spy agency phone and Internet data collection sweeps, prompted by the damaging torrent of leaks unleashed by Edward Snowden.
The Central Intelligence Agency is amassing a huge database of international money transfers that includes the financial and personal data of millions of Americans, The Wall Street Journal reported Thursday.