Find out what makes a tornado happen and if tornadoes can be prevented with large walls. Includes video.

Students are asked to explain how a tornado is formed and what a tornado does.

At this site, learn the definition of "tornado," and learn how a tornado, when simulated in a lab, can be useful to scientists. Included is a brochure with charts detailing research results.

This photo shows the shocking reality of the damage that can be caused by powerful tornadoes. This tornado left a catastrophic path of destruction through many homes and properties.

A huge tornado in Oklahoma, USA plows its way through anything standing in its path. It whips up debri from the ground below while the storm rages on in the dark skies above.