The Prism programme came to light when former National Security Agency contractor Edward Snowden revealed details of the NSA’s collection of telephone and Internet data to The Guardian and The Washington Post newspapers in June 2013. Snowden, who fled his job in Hawaii, went into hiding in Hong Kong.

Revelations about PRISM by former NSA contractor Ed Snowden have prompted a broader debate about government monitoring and the privacy of Americans’ communications. Photo: AP

Facebook, Yahoo want to disclose orders data

Facebook and Yahoo asked a secret court Monday to allow them to disclose data on national security orders the companies have received under the Foreign Intelligence Surveillance Act.