Dallas investigates a potential global helium shortage, Dr Yan tests shoppers on how much they know about radiation, and Liz tries out the new airport security technology that can see beneath your clothes. |
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Title: | Helium Shortage, Radiation and Airport Security | |
Air Date: | September 26, 2011 | |
Runtime: | 30 min | |
KathyC : So emotional to see someone shoot for such a big dream, I choked up many times.