Air travel exposes you to radiation – how much health risk comes with it?

By Timothy J. Jorgensen, Director of the Health Physics and Radiation Protection Graduate Program and Associate Professor of Radiation Medicine, Georgetown University. Captain, we're being pummeled by cosmic rays! muratart via Shutterstock.com This past April, business traveler Tom Stuker became the world’s most frequent flyer, logging 18,000,000 miles of air travel on United Airlines over the…