Which famous architectural product was originally developed as a military material before becoming widely used in landmark buildings like the Denver International Airport?

The field of architecture relies on innovative building products and materials that have transformed how structures are designed and built. Some of these products have fascinating origin stories and have become iconic in the industry. Test your knowledge about the history behind famous architectural products that revolutionized building design and construction!

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ETFE (Ethylene Tetrafluoroethylene) fabric
Laminated safety glass
Aluminum composite panels
Self-healing concrete