[Guardian] says Britain forced it to des

[Guardian] says Britain forced it to destroy Snowden material after further talks with the British government, two „security experts“ from Government Communications Headquarters, the British equivalent of the ultra-secretive U.S. National Security Agency, visited the Guardian’s London offices.
In the building’s basement, Rusbridger wrote, government officials watched as computers which contained material provided by Snowden were physically pulverized. „We can call off the black helicopters,“ Rusbridger says one of the officials joked.
A source familiar with the event said Guardian employees destroyed the computers as government security experts looked on.
http://www.reuters.com/article/2013/08/20/us-usa-security-snowden-guardian-idUSBRE97I10E20130820