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On one occasion, aware that Castro was a keen scuba-diver, the CIA devised
a cunning plan. Documents released under the Clinton administration confirm
that the agency invested in a large volume of Caribbean molluscs with the
intention of finding a shell big enough to contain a lethal quantity of
explosives. The idea was that the molluscs would be painted in vivid colours
to attract the attention of an underwater Castro.

Eventually this plan was abandoned, as was another that involved preparing
a custom-made diving-suit infected with a fungus that would cause a debilitating
skin disease.