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A few strategically placed boats, a handful of divers and a couple of on-land sabotage teams could send the world into a vicious tailspin.

US Navy divers were brought in to hook cables onto the sunken vehicle, and had to manoeuvre "through thick layers of mud, clay, and sediment with zero visibility", the statement said.

Lees was one of three divers who plunged into the water while the fourth man drove the boat, the Long Beach fire department said at the time.

The body of a man in his 20s has been recovered by police divers after he got into difficulty while open water swimming in the Lake District.

On Monday, divers searched the wreckage of the boat and the surrounding area but found no trace of Ms Clarke, from Lambeth, who is believed to have been in the toilet when the fire started.