A space shuttle explodes in flight. A bridge under construction over a busy highway collapses onto stopped cars. A forty-year-old condominium building comes down in a heap of rubble in the middle of the night, killing nearly a hundred people. What happened? And maybe the more important question is – how can we keep it from happening in the future? This is the work of forensic engineers – the experts who sift through the debris for clues. This important work has also been the basis of many improvements to building codes and engineering standards. For over two decades, Norb Delatte has been studying these cases and what we can learn from them.