Structural failure is often accidental. In a minority of cases, acts of terrorism cause deliberate impact-induced damage.

The 1995 bombing of the Alfred Murrah Federal Building in Oklahoma City is the most deadly act of 'homegrown' terrorism in the United States to date.

How does a structure behave when subject to a sudden impact, in particular - what is 'brisance'? How have engineers learnt from this tragedy when designing high-security buildings?

Please be aware that this podcast discusses acts of violence which some listeners may find distressing.