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Homes Destroyed by 2011 Earthquake and Tsunami in Miyagi prefecture, Japan

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Mega Disasters: Tornado Alley Twister
Mega Disasters: Tornado Alley Twister
Video Clip (2:42)

An F-5 tornado in the Dallas-Forth Worth area could cause millions of dollars of destruction.

Video Clip (2:42)
Mega Disasters: Windy City Tornado
Mega Disasters: Windy City Tornado
Video Clip (2:27)

Supercell thunderstorms could lead to a tornado in the Chicago area turning glass shards from the city's skyscrapers into deadly projectiles.

Video Clip (2:27)
Science of a Tornado
Science of a Tornado
Video Clip (2:58)

Get the facts on twisters, and how to protect yourself.

Video Clip (2:58)
Hurricane Katrina
Hurricane Katrina
Video Clip (2:38)

This clip from "History Uncut" provides aerial video of New Orleans, taken from a news helicopter, shortly after Hurricane Katrina. This provides a unique perspective of the devastation that Katrina wreaked on the city.

Video Clip (2:38)
Science of a Hurricane
Science of a Hurricane
Video Clip (2:30)

Find out how a hurricane forms--and what makes it so dangerous.

Video Clip (2:30)
Mega Disasters: California Katrina
Mega Disasters: California Katrina
Video Clip (2:42)

If snow from the Sierra Mountain peaks were to melt a surge of water could engulf California.

Video Clip (2:42)
Mega Disasters: San Francisco Earthquake
Mega Disasters: San Francisco Earthquake
Video Clip (2:15)

Multiple fault lines that run through California put San Francisco at risk for a catastrophic earthquake.

Video Clip (2:15)