A group of engineers in England and Wales has taken on the biggest challenge of the next Summer Olympic Games -- the construction of a complex steel-truss roof for the new Aquatics Centre. Shaped like a giant ocean wave, it's truly a high-tech wonder. Three thousand tonnes of steel will rest on only three points, like a tripod, leaving a 115-metre span of the roof totally unsupported. The fabricators and construction crews have their orders. Get this one absolutely right, because there's no room for even a millimetre of error. Only gold-medal perfection will do.
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