What mistakes caused a tragic bridge collapse in Oklahoma, a dam failure in England that threatened an entire town, a catastrophic grain elevator explosion near New Orleans and a fatal runaway train crash in Australia.

The tragic collapse of a sky-walk in a Kansas City Hotel is one of America's greatest engineering disasters, a deadly sinkhole in the middle of a San Antonio street is a result of a deteriorating infrastructure, an innovative student centre in Sheffield is demolished before it is completed and a highway interchange in Iowa is seeing increased congestion and more accidents.

A single massive cargo ship is grounded and blocking the Suez Canal causing a major impact to world trade. A Canberra highway overpass collapses during construction. A sinkhole in suburban Pennsylvania suddenly opens up swallowing a moving car on camera. A vital bridge on a key New Orleans evacuation route, is found to have a corrosion problem with its cables during an inspection following the collapse of another bridge.