dr. andrew wakefield in a moment. but, first, a look back at how the controversy started. dr. akefield's 1998 study, suggesting the possibility of a link between autism and the mmr vaccine gave many parents around the world a reason to stop vaccinating. and parents of children with autism a possible answer to the devastating question of why. >> they took their children to be vaccinated and then something happened. their children fell apart. >> in the years following his publication in "the lancet" no large-scale study could reproduce exactly what dr. wakefield's small study found and to investigative reporter, brian deere, that raised more questions than answers. >> he was not an independent researcher. >> deere learned he was working in a class-action suit planned against makers of the mmr by parents who believed their children were damaged by the vaccine. >> dr. wakefield was being paid by a firm of lawyers for two years before he ever published this report. >> no disputing that? >> no disputing that. >> deer says it was a conflict of interest that should have been disclosed

dr. andrew wakefield was banned from practicing medicine in the u.k. again. but that has been enormous.ave many measle outbreaks since they have chosen not to vaccinate. thank you for choosing us for 9news now at five, 9news now at 6:00 starts right now. >>> as you can see, our worst nightmare has come through. >> reporter: 45 days and still gushing. about 65 miles off the louisiana coast is now covered in i. frustrations are arriving it in washington and along the gulf coast. over why they just keep going and going. they are now going to try a procedure called top kill to stop the oil. crews will jam mud and cement into the ruptured well, but the tactic has never been used in water this deep. >> if it works, we should get that job completed that day on wednesday. and if it does not work, then i should tell you that we have other options. >> every day that is one more day that most of them do. >> we're doing everything that we can. i don't believe anyone