On the 155th anniversary of The Gettysburg Address, we bring you a conversation with Professor Adam Goodheart. He ran The New York Times blog, Disunion, which covers the American Civil War as if it were a real-time event unfolding today. Goodheart's used Civil War Era journalism as one of his primary sources and says that sharing updates about the war gives his readers a sense of immediacy that a traditional history book can't provide. He spoke to Brooke in 2010, also on November 19th, the anniversary of The Gettysburg Address.