When Big Things Go Wrong

Clues from other disasters are used to solve how the I-35 bridge in the heart of Minneapolis collapsed without warning at the peak of rush hour traffic.

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.

37,000-feet over Iowa, a DC-10 aeroplane explodes mid-flight and the quick-thinking pilot crash-lands, saving 184 passengers; the connection between the infamous Concorde crash, a fatal British skyscraper fire, and a North Dakota train derailment.