Composite sandwich structures: the new milestone in bridge building

Bridges have always been social and economic driving forces. Many have also become landmarks and icons. Prehistoric bridges were made of stone and wood. Brick, mortar, concrete, iron and steel later sneaked into the bridge builder's toolkit. And now it's the turn of polymer composite sandwiches to offer innovative solutions and a plethora of exciting, new possibilities. Freelance journalist Django Mathijsen reports.