Coming to America

Guests: Nancy Pelosi, Norah O'Donnell, Zac Posen. Henry Louis Gates, Jr. helps Congresswoman Nancy Pelosi, news anchor Norah O’Donnell and fashion designer Zac Posen explore their immigrant roots, retracing the journeys of their ancestors who arrived in the United States with little more than a dream--and revealing why that dream is still so inspiring today.