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Goes to great lengths to expel it. deposits build up in the nails and hair. the average person's hair grows about a half inch per month. sunday's hair was an inch long and provided a wealth of information. >> she had spent a month in the united states and before that she had been in egypt. so by taking her hair and looking at it specifically for lead content, and dividing it in half so that we had the half inch that grew in the united states and the half inch that grew before that, we were able to make a comparison and time her exposure. >> the hair was bombarded with radioactive neutrons. thi...

Since lead is a poison, the body goes to great lengths to expel it. deposits build up in the nails and hair. the average person's hair grows about a half inch per month. sunday's hair was an inch long. and provided a wealth of information. >> she had spent a month in the united states and before that she had been in egypt. so the by taking her hair and looking at it specifically for lead content, and dividing it in half so that we had the half inch that grew in the united states and the half inch that grew before that, we were able to make a comparison and time her exposure. >> the hair was bo...

Deposits build up in the nails and hair. the average person's hair grows about a half inch per month. sunday's hair was an inch long. and provided a wealth of information. >> she had spent a month in the united states and before that she had been in egypt. so the by taking her hair and looking at it specifically for lead content, and dividing it in half so that we had the half inch that grew in the united states and the half inch that grew before that, we were able to make a comparison and time her exposure. >> the hair was bombarded with radioactive neutrons. this caused different elements in...

One-time chairman of the transportation committee. patti ann: turning to the big debate over guns we're learning more about options president obama may consider to enact sweeping new gun control measures without congressional approval. shannon bream is live this morning in washington. shannon, how could federal relayings, regulations that is factor into the gun control fight? >> reporter: patti ann there are a number of different proposals involving a number of different agencies. one group is pushing the president to go through the department of justice and a task force to track interstate we...