By the end of 2003, 98 percent of the Sept. 11 families renounced any legal claims against the airlines and airport security companies in return for payments from a government fund that totaled $7 billion. Though 96 families pursued lawsuits, all but three have settled, collecting a total of $500 million.

"If it was about money, I would have been gone a long time ago. It's about ferreting out all the untold stories of the days leading up to 9/11 and 9/11. It's accountability, it's exposure, it's shining a light on some of those areas that have been successfully hidden from the public," Low said.