They are helping to develop new blast-resistant materials for structures and for body armor.

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When a splint is created using PCL, it becomes a sort of biological placeholder, propping up structures while the body heals around it.

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"Unfortunately for the narrow structures in the body (like urethras), they are kind of complex because they tend to collapse, " said Atala, who added that conventional urethra replacement fails more than half the time.

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Dr Mahdavi is working on other lattice structures, including aerodynamic body parts for racing cars and special insoles for a firm that hopes to make the world's most comfortable stiletto-heeled shoes.

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Clearly, it would be far easier for Mr. Bush to go with the flow, earning the kudos of the chattering classes at home and abroad by allowing agreements reflecting the lowest common denominator of scores of nations to become part of the growing body of supranational institutions and legal structures.

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It provoked widespread criticism of football's world governing body and calls for a reform of its structures.

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