Jenna Johnson; Opioid Addiction; Robert Plant; Sean Baker

Journalist Jenna Johnson reports on Trump's declaration that opioid addiction is a "national public health emergency"; a closer look at opioid abuse with Dr. Nora Volkow, director of the National Institute on Drug Abuse, Dr. Lipi Roy, an addiction medicine physician, and Peter Santoro, vice president of the Lower Eastside Service Center; rock star Robert Plant introduces his new solo album, "Carry Fire"; director Sean Baker on "The Florida Project."