Dr. Anthony Fauci joins CBS News chief medical correspondent Dr. Jon LaPook to look back on his nearly 40 year career at the NIH serving seven presidents. Dr. Fauci, who is stepping down at the end of the year, currently serves as President Joe Biden’s chief medical adviser and the director of the National institute of Allergy and Infectious Diseases at the National Institutes of Health, The 81-year-old reflects on his Brooklyn upbringing, his Jesuit education and the lessons learned early in the fight against HIV/AIDS.