WikiLeaks' Julian Assange has threatened to release 'key parts' of secret US documents if anything happened to him or WikiLeaks.
Salvatore Di Nolfi/Keystone/AP/File
The "thermonuclear device," so named by Mr. Assange's lawyer, is believed to refer to a mysterious 1.4 GB file labeled "insurance" that was uploaded onto the WikiLeaks website in late July, just after the website published 77,000 Afghan war documents.
The file, believed to include the more than 251,000 US State Department cables obtained by WikiLeaks, is seen as an insurance policy for the embattled WikiLeaks in case of potential attacks on its founder or its website before the full trove is made available to the public.
“... this is, I think, what they believe to be a thermonuclear device effectively in the electronic age,” Mr. Assange’s lawyer, Mark Stephens, said Sunday during an interview on the BBC’s Andrew Marr Show.