HHS Secretary Robert F. Kennedy Jr. faced senators this morning, defending his approach to the CDC, official vaccine policies, and the firing of former CDC Director Susan Monarez. Former Acting CDC Director Dr. Richard Besser, Director of the Vaccine Education Center Dr. Paul Offit, and MSNBC medical contributor Dr. Vin Gupta join Ana Cabrera to react to the hearing. Our next MSNBC Live event is on October 11th in New York City! Buy Tickets now: msnbc.com/live25 For more context and news