Newt talks with Walter Isaacson, bestselling author and historian, about his new book, "The Greatest Sentence Ever Written," which explores the creation and significance of one of history’s most powerful sentences: “We hold these truths to be self-evident, that all men are created equal, that they are endowed by their Creator with certain unalienable Rights, that among these are Life, Liberty and the pursuit of Happiness” from the Declaration of Independence.