The 9/11 mastermind's trial faces uncertainty as the U.S. rejects plea deals, and victims' families seek closure.

After nearly two decades, the case against 9/11 mastermind Khalid Sheikh Mohammed and co-defendants faces new uncertainty as plea deals are disavowed by the federal government but supported by defense lawyers. Victims' families, like Ken Fairben, who lost a child in the attacks, are grappling with mixed emotions, hoping for closure but also seeking more information, especially regarding potential Saudi government involvement. The case is further complicated by the torture of the defendants while in CIA custody.