Historian Henry Louis Gates Jr.’s quest to piece together Lincoln’s complex life takes him from Illinois to Gettysburg to Washington, D.C., and face-to-face with people who live with Lincoln every day – relic hunters, re-enactors, and others for whom the study of Lincoln is a passion. Among those weighing in: Pulitzer Prize winners Doris Kearns Goodwin and Tony Kushner; presidents Bill Clinton and George W. Bush; and Lincoln scholars including Harold Holzer, vice chair of the Abraham Lincoln Bicentennial Commission; Harvard University’s president Drew Faust and history professor David Hebert Donald; Yale University history professor David Blight; and Allen Guelzo of Gettysburg College.