In 1957, Britain exploded its first megaton hydrogen bomb - codenamed Operation Grapple X. It was the culmination of an extraordinary scientific project, which against almost insuperable odds turned Britain into a nuclear superpower. This is the inside story of how Britain got 'the bomb'. The BBC has been granted unprecedented access to the top-secret nuclear research facility at Aldermaston. The programme features interviews with veterans and scientists who took... see more