From Blinkx Video:
A once-secret 1940s tunnel complex under the centre of London that housed military intelligence and linked the cold war hot line phone between Washington and Moscow has been put up for sale. Former state telephone monopoly BT says the one mile long network of tunnels below Chancery Lane underground station is now surplus to requirements. The complex was dug in 1942 as a bomb shelter for 8,000 people during the Second World War, but was taken over by military authorities as a communications and intelligence centre.
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(Hat Tip: The Danger Room)