GUANTANAMO BAY, Cuba — Testimony at Guantanamo Bay’s war court by the architect of the CIA’s enhanced interrogation program shed light on what the government paid his company more than $80 million to do.

Speaking under oath in open court for the first time last week, former Air Force psychologist Dr. James Mitchell was pressed by defense lawyers representing alleged plotters of the 9/11 terrorist attacks about his major role in assisting the CIA’s rendition, detention, and interrogation program. The program involved at least 119 detainees held in agency black sites following the deadly attacks of Sept. 11, 2001.