1. Mount St. Helens

From scientists to campers to residents, discover the stories of those who were there when Mount St. Helens erupted.

2. San Francisco Quake

Discover the devastation a 7.1-magnitude earthquake can wreak on a city as we revisit the San Francisco quake of 1989.

3. Oklahoma Tornado

Rarely seen footage and nerve-wracking stories place you in the middle of the Oklahoma tornado of 1999.

4. Oil Rig Explosion

Follow a handful of men as they race for survival through the smoke and fire-filled labyrinth of the Piper Alpha Oil Rig.

6. Dam Disaster

See how a massive landslide into a dam reservoir caused a wave of disaster to hit the village of Longarone, Italy.