The Supreme Court will decide whether a longtime Guantanamo Bay detainee interrogated at CIA black sites around the world should gain access to information about the two men who waterboarded him in the wake of the Sept. 11, 2001, attacks.

Abu Zubaydah, an alleged al Qaeda member and associate of Osama bin Laden who was captured in Pakistan in March 2002, has been held at the U.S. naval base in Cuba since 2006 after having been interrogated at a number of secret CIA locations around the world, including one widely believed to have been in Poland. The Saudi-born terrorist, now 50 years old, sought subpoenas against James Mitchell, a former clinical psychologist at the Air Force survival school, and fellow psychologist, Dr. John “Bruce” Jessen, who worked as CIA contractors to design the agency’s “enhanced interrogation program,” considered by some to be torture, and to help implement it, including waterboarding Zubaydah.