Assertion: nuclear weapon | /r/CapableOf | weigh 4,500 kilograms
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text: The UK's first nuclear weapon, Blue Danube, was large and cumbersome, being 7.3 metres (24 ft) long and 1.5 metres (5 ft) wide, and weighed 4,500 kilograms (10,000 lb), so only the Royal Air Force (RAF) V-bombers could carry it.