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ALDERMASTON, UNITED KINGDOM - MARCH 24: An anti-nuclear campaigner walks the perimeter fence at Aldermaston Atomic Weapons Establishment (AWE) on March 24, 2008 in Berkshire, England. 50 years ago 10,000 people walked from London to the AWE at Aldermaston in Berkshire to protest at Britain's first hydrogen bomb tests. (Photo by Peter Macdiarmid/Getty Images)

ALDERMASTON, UNITED KINGDOM - MARCH 24:  An  anti-nuclear campaigner walks the perimeter fence  at Aldermaston Atomic Weapons Establishment (AWE)  on March 24, 2008 in Berkshire, England.  50 years ago 10,000 people walked from London to the AWE at Aldermaston in Berkshire to protest at Britain's first hydrogen bomb tests.  (Photo by Peter Macdiarmid/Getty Images)