Oklahoma has been ravaged by a massive, mile-wide tornado, with more predicted to come. We talked about the megastorms with atmospheric scientist Karen Kosiba, whose work is showcased in documentary Tornado Alley.

The past few days have seen hundreds of tornadoes touching down in the southeastern United States, driven by massive storms. We talked about the megastorms with atmospheric scientist Karen Kosiba, whose work is showcased in documentary Tornado Alley.