In April, I asked Taibbi if he would be interested in interviewing David Ray Griffin, a leading member of Scholars for 9/11 Truth & Justice, Emeritus Professor of Philosophy of Religion and Theology at Claremont School of Theology and Claremont Graduate University and author of seven of books on 9/11, about his recent book, 9/11 Contradictions. After months of back and forths between them and some editorial delays, I'm pleased to share their written exchange -- all 24,000 words of it. What we have here are the preeminent writers on both sides of the 9/11 Truth argument; a one-of-a-kind debate. Because the questions and responses are quite long, I've woven them together in order. Enjoy. -- Jan Frel, AlterNet Senior Editor.