This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated.

Legendary storm chaser and structural engineer Tim Marshall recounts his experiences and impressions of the tornado outbreak of April 21, 1967, and sheds light on a project in which he’s currently engaged which recently position two instrument pods in two different tornadoes yielding a treasure trove of information he’ll tell us about.