Why do a hotel in New Orleans and two elevated pedestrian campus walkways in North Carolina tragically collapse during construction. What causes a wind turbine to self destruct in Denmark, a pioneer in the use of commercial wind power.

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.