Summary: <p>Tornadoes have been spotted all around the globe. In the suburbs of Rome in 1749, in Bangladesh, Australia and elsewhere. But nowhere in the world are conditions more perfect for tornadoes than the Central Plains of North America. The Great Tri-state Tornado of 1925 was the deadliest in American history. It killed some 900 people in Missouri, Illinois and Indiana. A new book delves into the history of Americans' relationship with twisters. And new research by the National Severe Storms Lab examines whether climate change is affecting the incidence or severity of tornadoes.</p>
