Philip Zelikow - Key Architect: Creating a Bipartisan Commission

Philip Zelikow, the Executive Director of the 9/11 Commission, was a key architect in developing and implementing a strategy to conduct a highly complex investigation into one of the most consequential events in US History and in creating an unclassified and readable report that would stand the test of time. How do you approach an investigation of this scale while under intense security and an impossible deadline?