A leak of hundreds of secret intelligence papers from agencies all over the world, offering a glimpse into the murky world of espionage.

Al Jazeera's Investigative Unit, in collaboration with The Guardian newspaper, is publishing an array of articles, analyses exploring the stories contained within the documents.

The Spy Cables include papers written by intelligence agencies the world over, including: Israel’s Mossad, Britain’s MI6, Russia’s FSB, Australia’s ASIO and South Africa’s SSA.