Stock Photo - Researcher Josh Wurman explains how one of his ´tornado pods´ works to a Discovery Channel film crew filming his research, May 6, 2010, in Kansas Josh is co-leading Project Vortex 2, a two year science mission to study the origins of tornadoes

Stock Photo: Researcher Josh Wurman explains how one of his 'tornado pods' works to a Discovery Channel film crew filming his research, May 6, 2010.

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