On a test flight for an experimental Virgin Galactic spacecraft, catastrophic design flaws send this multi-million dollar endeavor on a crash course to tragedy; experts investigate what caused this visionary engineering marvel to fail.

When the Exxon Valdez oil tanker spills millions of gallons of crude oil at sea, it contaminates Alaska's pristine coastline and creates an apocalyptic environmental catastrophe. Experts investigate what caused this horrific disaster.

Engineers investigate the cause of the space shuttle Columbia disaster.

Experts look into why Los Angeles wasn't prepared for a deadly earthquake.