What made America? What makes us? These two questions are at the heart of the new PBS series Faces of America with Henry Louis Gates, Jr. The Harvard scholar turns to the latest tools of genealogy and genetics to explore the family histories of 12 renowned Americans — professor and poet Elizabeth Alexander, chef Mario Batali, comedian Stephen Colbert, novelist Louise Erdrich, journalist Malcolm Gladwell, actress Eva Longoria, musician Yo-Yo Ma, director Mike Nichols, Her Majesty Queen Noor, television host/heart surgeon Dr. Mehmet Oz, actress Meryl Streep, and figure skater Kristi Yamaguchi.