Engineering Catastrophes

Oklahoma Freeway Free-Fall (4x7)

:

Experts investigate a deadly tragedy in an Oklahoma bridge collapse. A deadly disaster in Arkansas, as a major freeway bridge is brought to its knees. In the UK, the Royal Air Force races to save a failing dam... and the town below it. Near New Orleans, why did a grain elevator explode so catastrophically? And tragedy strikes on a runaway train, revealing a major safety flaw.