450 Bastille Day in France; The Only Street in Paris; Americans in Paris

Historian David McCullough introduces us to some of the most influential "Americans in Paris" of the 19th century, who returned home to apply the lessons they’d learned in the City of Light — thereby helping transform a young United States. Also, tour guides from France celebrate Bastille Day with us, and New York Times correspondent Elaine Sciolino tells us what makes her own neighborhood in Paris feel like home.