They are among the most powerful forces on Earth. With swirling winds of more than 300 miles per hour, and the strength to destroy nearly everything in their path, they account for an average of 60 deaths and millions of dollars in property damage every year. In this dramatic episode, we will travel into the eye of the storm with tornado chasers and visit the leading scientists in Europe and the U.S. who are making advances in combating these frightening forces of nature.