engine - 1:30 pm on Jul 16, 2013 (gmt 0)
Details of the official justification for the US National Security Agency's wide-ranging Prism surveillance programme look set to be revealed.
Yahoo has won a legal fight that will see papers from a key 2008 court case declassified and published.
The 2008 case is widely seen as pivotal in letting the NSA establish Prism and start gathering data on web use.
The US government has been given until 29 July to say how long it will need to prepare the documents for publication.Yahoo Wins Battle Over Prism Court Papers To Be Revealed [bbc.co.uk]