Prism: ministers challenged over GCHQ's access to covert US operation

Government rounded on after disclosure that highly-classified system supplied eavesdropping headquarters with information Ministers are under mounting pressure to explain whether they authorised GCHQ to gather intelligence on Britons from the world's biggest internet companies through a covertly run operation set up by America's top spy agency. MPs, academics and campaign groups rounded on the government after the Guardian disclosed that GCHQ, the UK's electronic eavesdropping and security headq...