dr. keithck has been talking about this longer than many but the voices joining him are becoming louder and more prominent. the city of san francisco pushed for radiation warning labels on cell phones. the head of a prominent cancer research institute sent a memo to all employees urging them to limit cell phone use because of possible risk of cancer. the european environmental agency has pushed for more studies saying cell phones could be as big a public health risk as smoking and leaded gasoline. the federal communications commission, the fcc, they set the guidelines for how much radiation a cell phone can emit and they say cell phones are safe. how can they be so sure? keeping them honest, we decided to come here to try to find out for ourselves but they declined an on-camera interview. the type of radiation coming out of your cell phone is called nine iedonnizing. it's not like an x-ray but more like a low powered microwave oven. >> what microwave radiation does in the most simplistic term i

dr. keith black has been talking about this longer than many.joining him are becoming louder. the city of san francisco pushed for radiation warning levels on cell phones. the head of a prominent cancer institute urged all employees to limit cell phone use because of possible risk of cancer. and the european environmental protection agency say cell phones could be as big a risk as smoking, asbestos and leaded gasoline. the fcc set the guidelines for how much radiation a cell phone can emit and they say cell phones are safe. but how can they be so sure? keeping them honest, we decided to come here and find out for ourselves, but they declined an on camera interview. the type of radiation coming out of your cell phone is non-ionizing. it's more like a how powered microwave oven. >> what microwave radiation does, in the most simplistic terms, is very similar to what happens to your food when you put your food in a microwave oven. it's essentially cooking the brain. >> reporter: based on their past statements, the fcc isn't convinced there's a real

dr. keith black has been talking about this longer than many. the voices joining him are louder and more prominent. the city of san francisco pushed for radiation warning labels on cell phones. the head of a prominent cancer research institute sent a memo to all employees urging them to limit cell phone use because of possible risk of cancer. the european environmental agency has pushed for more studies saying cell phones could be as big a public health risk as smoking, asbestos and leaded gasoline. >> the fcc set the guidelines for how much radiation a cell phone can emit and they say they're safe. but how can they be so sure? keeping them honest, we decided to come here to try to find out for ourselves. that's declined an on-camera interview. the type of radiation coming out of the cell phone is called nonionizing. >> what micro radiation does in the most simplistic term is very similar to what happens to your food when you put your food in a microwave oven. it's essentially cooking the brain. >> based on their past statements, the fcc isn't c

dr. keithas to say. >> there is no way to say that cell phone use is safe. i think that the public has a right to know that there could be a potential risk. the public generally assumes that if one is selling something on the market, that we have had assurances that that device is safe. >> reporter: to be clear, dr. black's message is at odds with headlines from the largest international study on cell phones and cancer. their conclusion, little or no evidence cell phones are associated with brain tumors. but if you look just one layer deeper into the appendix of that same study and you'll see something unsettling. it turns out participants in the study who used a cell phone for ten years or more had double the rate of brain glioma, a type of tumor. and keep in mind, cell phone use in the united states has only been popular for around 15 years. back in 1996, there were 34 million cell phone users. today, nearly 300 million in use according to industry figures. >> environmental factors take decad

dr. keith black has been talking about this longer than many.he voices joining him are becoming louder and more prominent. the city of san francisco pushed for radiation warning labels on cell phones. the head of a prominent cancer research institute sent a memo to all employees urging them to limit cell phone use because of possible risk of cancer. and the european environmental agency has pushed for more studies, saying cell phones could be as big a public health risk as smoking, asbestos, and leaded gasoline. the federal communications commission, the fcc, they set the guidelines for how much radiation a cell phone can emit, and they say cell phones are safe. but how can they be so sure? keeping them honest, we decided to come here to try and find out for ourselves. but they declined an on-camera interview. >> reporter: the type of radiation coming out of your cell phone is called non-ionizing. it's not like an x-ray but more like a very low-powered microwave oven. >> what microwave radiation does in the most simplistic term is very similar t

to walk through what is and isn't known, we're joined by dr. keithr of neuro- surgery and neuroscience at cedars-sinai medical center in los angeles. dr. black, welcome to you. what does possibly carcinogen i can mean exactly? >> what it means is that the world health organization panel of scientists looked at the current available evidence that's been published as well as some unpublished data that should be coming out shortly from the multinational study and concluded that the evidence suggests that there is a possible link between cell phone use and brain cancer. this is looking at multiple studies. the best conclusion at this point would suggest that there is the possibility for a link. >> brown: now the issue is the radiation, right? explain what researchers are concerned about and what they're studying. >> essentially a cell phone is a microwave antenna which generates microwave radiation. we know that microwave radiation can penetrate into the brain when you hold the cell phone next to your ear. in fact, it's related to the square of the dista

. >> reporter: dr. keith dinato is an orthopedic surgeon at pacific medical center. he says posey's injuries will likely require surgery. >> it's going to be a season-ending injury, unfortunately. the recovery time is usually long. just to get bones to heal in a healthy adult is about eight weeks. and if you're talking about ligamen ligaments, especially in the knee, those may take as long if not longer. >> reporter: 245 wthat was not welcome news to the thousands of giants fans attending today's game against the marlins at at&t park. >> after seeing that last night it's kind of hard. i didn't even know if i wanted to come today. >> it was a huge shock, you know. i really don't know what they're going to do coming up. some of us are thinking trade. some of us are thinking other things. i would love to see him come back. obviously, that's probably not an option. >> reporter: wendy bryant and her two friends came to the game offering prayers for posey. >> i'm sure that he's pretty devastated today and frustrated, and we hope that there's a speedy recovery and this isn'

. >> dr. keith hall is the commissioner of labor statistics for the u.s.t of labor, the bls is an independent national statistical agency that collects, processes, analyzes, disseminates essential statistical data to the american public, the u.s. congress, other federal agencies, state and local governments, business and labor dr. hall as absurd as a chief economist for the white house council of economic advisers for two years under president george w. bsh. prior to that he was chief economist for the u.s. department of commerce. dr. hall also spent 10 years at the u.s. international trade commission. he received his ba from university of virginia and his ph.d and m.s. degrees from purdue university. doctor, thanks again for being here. we are grateful to have your testimony. >> mr. chairman, and members of the committee, thank you for the opportunity to discuss the employment unemployment data we released this morning. nonfarm payroll employment increased by 244,000 in april, and the output rate edged up to 9.0%. over the last three months payroll employ

. >> dr. keith hall is the commissioner of labor statistics for the u.s.artment of labor, the bls is an independent national statistical agency that collects, processes, analyzes, disseminates essential statistical data to the american public, the u.s. congress, other federal agencies, state and local governments, business and labor dr. hall as absurd as a chief economist for the white house council of economic advisers for two years under president george w. bush. prior to that he was chief economist for the u.s. department of commerce. dr. hall also spent 10 years at the u.s. international trade commission. he received his ba from university of virginia and his ph.d and m.s. degrees from purdue university. doctor, thanks again for being here. we are grateful to have your testimony. >> mr. chairman, and members of the committee, thank you for the opportunity to discuss the employment unemployment data we released this morning. nonfarm payroll employment increased by 244,000 in april, and the output rate edged up to 9.0%. over the last three months payroll

. >> dr. keith hall is the commissioner of labor statistics for the u.s. department of labor, the bls is an independent national statistical agency that collects, processes, analyzes, disseminates essential statistical data to the american public, the u.s. congress, other federal agencies, state and local governments, business and labor dr. hall as absurd as a chief economist for the white house council of economic advisers for two years under president george w. bush. prior to that he was chief economist for the u.s. department of commerce. dr. hall also spent 10 years at the u.s. international trade commission. he received his ba from university of virginia and his ph.d and m.s. degrees from purdue university. doctor, thanks again for being here. we are grateful to have your testimony. >> mr. chairman, and members of the committee, thank you for the opportunity to discuss the employment unemployment data we released this morning. nonfarm payroll employment increased by 244,000 in april, and the output rate edged up to 9.0%. over the last three months pay

dr. keith black at cedars-sinai says he believes there is a concern.of pittsburgh, said, limit your cell phone use, use earpieces. san francisco wants to put warning labels on their cell phones. in europe, they have said, we need more testing. we believe this is potentially as big a health epidemic as asbestos, tobacco and leaded gasoline. there are louder and more prominent voices on this. >> the fcc tells you you can't use phones on airplanes even though there is no evidence that that does dangerous. phones are dangerous on airplanes but unsafe next to your head. should we be listen together fcc on this? >> part of this issue is, it may not have been long enough to know the impact of cell phones on the brain, specifically with regard to cancer. it takes 20, 25, 30 years for these cancers to develop. cell phones haven't been around that long. the way they actually do some of the safety testing. i went to one of these safety labs. they let us come in there. you are looking at a skull. this he create a model brain, which is just water, salt and sugar, d

. >> dr. keith hall is the commissioner of labor statistics for the u.s.epartment of labor, the bls is an independent national statistical agency that collects, processes, analyzes, disseminates essential statistical data to the american public, the u.s. congress, other federal agencies, state and local governments, business and labor dr. hall as absurd as a chief economist for the white house council of economic advisers for two years under president george w. bush. prior to that he was chief economist for the u.s. department of commerce. dr. hall also spent 10 years at the u.s. international trade commission. he received his ba from university of virginia and his ph.d and m.s. degrees from purdue university. doctor, thanks again for being here. we are grateful to have your testimony. >> mr. chairman, and members of the committee, thank you for the opportunity to discuss the employment unemployment data we released this morning. nonfarm payroll employment increased by 244,000 in april, and the output rate edged up to 9.0%. over the last three months payro