When Big Things Go Wrong

A Boeing 777 crash lands into the San Francisco Airport with no warning, leaving everyone baffled. As engineers race to figure out what happened, they turn to other disasters to unveil the complicated relationship between humans and machines.

In the heart of Minneapolis, the busy I-35 bridge collapses at the peak of rush hour traffic. As the city reels, the question on everyone's mind is: how did an enormous steel bridge fail without warning?

A high-speed train catastrophically crashes in Spain. In service less than a year, its derailment shocks the world. So what can an out-of-control cruise liner in Venice uncover about one of the deadliest rail disasters in Spain's history?

Italy suffers one of the worst engineering disasters when the Morandi bridge suddenly collapses. Built in the 60s, it was thought to be indestructible, so what went wrong?

37,000-feet over Iowa, a DC-10 airplane explodes mid-flight. The quick-thinking pilot crash-lands, saving the lives of 184 passengers. But how could this disaster happen?