Project Skydancer was the brainchild of the Ministry of Defence. Beautiful and terrifying in its simplicity, DS29 had designed new warheads for Polaris missiles, warheads that with consummate ease could evade the new batteries of anti-ballistic missilesthe Russians had set up around their prime military targets. For Aldermaston scientist Peter Joyce, it was the pinnacle of his career. Until his documents from the project turned up one chilly October morning on Parliament Hill, and the Ministry's prime.