Future of GOP, Pandemic Inequality, Facebook & Fake News

Is Donald Trump now the head of the Republican Party? Also, why the economic recovery of wealthy nations depends on poor countries also getting vaccinated against COVID-19. Then, investigative journalist Maria Ressa on a sophisticated social media campaign to convince the public she’s a criminal. Also on today's show: the effects of extensive social media use on teenage mental health, the ethics of scientists infecting healthy volunteers with COVID-19 to see which vaccines work best, and how an artificially intelligent computer could make diagnosing ADHD more accurate. (AP Photo/Alex Brandon, File)