today david kerrville is head of the u.s. government's nutrition program and he's invited all over the world for a scientific conferences where he gives his experts point of view. totally independent. to. introduce reasons why the need is in order to be healthy diet has been just. on that day he was in front speaking to scientists from around the world about meat and the link between processed meat and cancer in order to denounce backed up by a power point the climate of fear panic and even hysteria. and we know because we were there. it was right at the start of our investigation when we barely knew about nitrites and had the need of enlightened specialists to help us. so there are new reviews published this year that say nitrite is not harmful and others that say it is harmful. i don't think anybody really knows. definitively what the answer is. a few months after this handshake you can learn more about the industry and doubt bell started raining. so we took advantage of our trip to america to ask him for another interview.