In Minneapolis, what caused a major freeway bridge to suddenly collapse in the middle of rush hour? Why did a routine demolition in Dallas stun the crowds? In Denmark, a railway tragedy reveals a Europe wide safety flaw. And in Iowa, a battle between Mother nature and engineering triggers a major dam collapse.

In Kentucky, a shocking sinkhole buries iconic Corvettes in the dirt. In Australia, catastrophe strikes mid-construction on a massive Melbourne bridge. Heavy engineering rocks the Earth in Oklahoma. And in Ontario, a near miss on the Trans-Canada Highway.

In North Dakota, an explosive derailment nearly takes out a town. In Taiwan, what caused a unique harbour bridge to fail in seconds? Stormy weather brings the roof down on a state-of-the-art stadium in Kansas City. And in Canada, a routine bridge renovation goes badly wrong.

In Canada, a tragedy strikes a busy shopping centre. In Missouri, a massive dam collapses within minutes.

Massive Engineering Mistakes can strike anytime, anywhere. In Texas, massive destruction as an oil refinery explodes. Flooding in Iowa takes down a vital railroad crossing. In Australia, design flaws force a rebuild of Melbourne's hottest tourist attraction. And near tragedy, as a Danish construction project fails over a busy highway.

In New Orleans, a hotel under construction collapses. In Denmark, a destroyed wind turbine arouses incomprehension.