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

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

Witness the worst sea disaster in U.S. naval history, the sinking of the USS Indianapolis, and the horrors that ensued.

Witness the worst sea disaster in U.S. naval history, the sinking of the USS Indianapolis, and the horrors that ensued.

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

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

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

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

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

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

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

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