Overview: Senators Susan Collins, Heidi Heitkamp explain their Kavanaugh confirmation votes; then Jon Wertheim profiles best-selling author John Green on reaching young adults and dealing with mental illness, who is also a star of YouTube podcasting; and Lesley Stahl goes to Modena, Italy, to meet chef Massimo Bottura: The Pavarotti of pasta to taste and see why his restaurant ranks No. 1 on the list of the top 50 eateries in the world.