David McCullough discusses "The American Spirit: Who We Are and What We Stand For" with David M. Rubenstein at the 2017 Library of Congress National Book Festival in Washington, D.C.Former Librarian of Congress James H. Billington has called David McCullough the "citizen chronicler" for his meticulously researched and beautifully written historical books, such as the Pulitzer Prize winners "Truman" and "John Adams," the latter of which became an Emmy Award-winning miniseries on HBO. He is also a two-time winner of the National Book Award, for "The Path Between the Seas" and "Mornings on Horseback." His newest book is "The American Spirit: Who We Are and What We Stand For." McCullough has also received the National Book Foundation Distinguished Contribution to American Letters Award, the National Humanities Medal and the Presidential Medal of Freedom.