Do cell phones cause cancer? And what exactly does the World Health Organization have to say about it? A Chicago scientist who contributed to the latest report joins us to clarify the findings.

More on the Story: Tips to reduce cell phone radiation exposure Are you concerned about possible cancer risk from cell phones?Scientist David McCormick's bio and researchWHO press releaseNational Cancer Institute Fact Sheet: Cell Phones & Cancer RiskAmerican Cancer Society: Cancer Causes: Cell PhonesEnvironmental Working Group: Cell Phone Radiation Exposure