Science correspondent Miles O’Brien examines the threat that radioactive "dirty bombs"could pose to cities in the U.S., and what’s being done to prevent a radiological attack from happening.
When David Hahn was young, he was fascinated by science, a well-worn copy of "The Golden Book of Chemistry Experiments" his scientific bible.
He was most fascinated with the story of Pierre and Marie Curie’s discovery of radioactive elements. So, on his way to becoming an Eagle Scout, he naturally decided to get his atomic energy merit badge.
http://www.pbs.org/newshour/bb/science/jan-june11/dirtybombs_02-08.html