An in-depth look at the modern era's most complex, deadly, and controversial engineering failures. With the aid of 3-D animation, forensic experts, and footage of disasters, we seek to understand what went wrong and how mishap led to remedy. Stories include: the Marines' AV-8 Harrier "Jump Jet"; the Ford Explorer/Firestone rollovers; fire on the Piper Alpha offshore oil rig; derailment of a high-speed train in Germany; and computer errors that brought the world to the brink of accidental nuclear war.