President-elect Trump's decision to nominate Robert F. Kennedy Jr. as the Secretary of Health and Human Services is sparking concern. There are worries too about his history of false statements and beliefs in debunked conspiracy theories. At the same time, he's pushing hard on some major problems that experts say are real. Geoff Bennett discussed more with Dr. Katelyn Jetelina. PBS News is supported by - https://www.pbs.org/newshour/about/funders