What does a 19th-century British railway disaster have in common with the 21st-century destruction caused by Hurricane Katrina in New Orleans? All were engineering failures that resulted in important improvements in the engineering process. Discover the very human issues that contributed to poor engineering decisions in these three cases, with disastrous consequences.

One spring evening in the mid-19th century, a three-span iron bridge across England’s River Dee collapsed just as a locomotive reached the middle of the third span. Railroad technology was only just coming of age, and this collapse was one of its most serious accidents to date. Discover how this accident inquiry led to improved bridge safety throughout the country.

In 1976, the American Institute of Architects presented an Honor Award to Helmut Jahn for his innovative design of the Kemper Arena in Kansas City. Three years later, a 43,000-square-foot section of the roof collapsed. Follow the forensic engineers as they painstakingly analyze the arena’s innovative design and identify four major factors that contributed to the roof’s collapse.