At this web site, NOVA features articles, interactive activities, and other resources about tornados in the United States. Users can learn why the United States is home to about three-fourths of all tornados worldwide. A fun interactive module allows users to access and rate the strengths of tornados based on images of destruction. Thomas Grazulis presents an article detailing the destruction of a 1928 tornado, which will make everyone appreciate the advances meteorologists have made in tornado forecasting. Users can learn how conventional building practices and sprawl may increase tornado disasters through an interview with Tim Marshall. With its amazing images and fascinating articles, everyone will enjoy this website.