On July 20th, 2013, two technicians from the UK's intelligence agency GCHQ looked on as Guardian editors destroyed the computers which contained the encrypted files leaked by Edward Snowden. Now, you can watch them do it.

Stepping out their usual routine of reporting, the journalists found themselves in the basement of the Guardian's office in Kings Cross, London, equipped with angle grinders. The video, below, is the first time the footage of the event has been made public. "It's harder to smash up a computer than you might think," explained Guardian editor Alan Rusbridger. True that. [Guardian]