The First Lady's Family Tree

First Lady Michelle Obama looks on as US President Barack Obama speaks before signing a memorandum on childhood obesity February 9, 2010 in the Oval Office

New York Times correspondent and author of American Tapestry: The Story of the Black, White, and Multiracial Ancestors of Michelle Obama, Rachel L. Swarns, discusses her book about the ancestry of Michelle Obama, illuminating the complexity of racial intermingling in a changing nation.