Tornadoes are one of nature's deadliest forces, unmatched in fury, speed and destructive power. Over the centuries, tornadoes have wrought destruction on a huge scale and cost a great many lives. This program takes a look at some of the most devastating twister storms to hit the planet in the last 100 years. From the world's worst twister (which struck Daultipur in Bangladesh in 1989), to the most expensive tornado in history (the 1999 Oklahoma Tornado which caused $1.4 billion worth of damage), this program explores tornadoes through extraordinary footage and remarkable true stories from those who have survived. Discover how tornadoes are formed in super cell thunderstorms and how meteorologists use science to save lives, predicting twister attacks before they happen. Learn how 21st-century technology aids our understanding of this extreme weather phenomenon, and meet the storm-chasers who thrill at getting up close and personal with tornadoes. This journey into the swirling heart of the tornado reveals the raw power and awesome, deadly, beauty of nature at its most ferocious.