Wind turbine and crane driver
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Wind farms: Tense job of moving huge turbines by crane

This week, BBC News is taking an in-depth look at offshore wind turbines, and the challenges, costs and construction of these sea giants.

Here, science correspondent David Shukman talks to crane driver Robert Chiles, at Harland and Wolff's dockyard in Belfast, Northern Ireland, about being responsible for moving the huge - yet fragile - turbines around the docks.