A global look at where tornados occur and why

Severe tornadoes have been rolling through several Midwestern states in recent days, causing extensive damage and a number of fatalities. The United States experiences the most and the deadliest tornadoes in the world, but they do happen on every continent except Antartica. Host Carolyn Beeler gets a global look at tornadoes with Jana Houser, an atmospheric scientist at Ohio State University who specializes in tornadoes.