A document obtained by the ACLU suggest that the 9/11 Commission was told to not probe too deeply into the possible reasons for the terrorist attacks of September 11, 2001.
The commission was told in the memo to not address with any significance the treatment of detainees at the Guantanamo Bay Detention Center. There are no indications that the memo stymied the commission in its attempts to determine what happened on that day.
Still, the surfacing of the memo serves to raise questions about what else the commission was precluded from investigating. There are renewed calls for a reopening of the investigation into the attacks on the World Trade Center and the Pentagon.