Death penalty trial date set for alleged September 11 attackers

Karen Greenberg, director of the Center of National Security, said the suspects' torture and their mental health conditions would be major factors in the trial considering they face the death penalty if convicted.

"What lies at the heart of this case is is it possible to bring this case with clean evidence - evidence that was not derived from torture," Greenberg told Al Jazeera.

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Karen Greenberg