Lawsuit accuses CIA of endorsing torture techniques under the guise of science.

The Justice Department has signaled that it won’t try to block a lawsuit arising from the CIA’s harsh interrogation techniques.

The move leaves the door open for a court challenge over tactics that have since been discontinued and widely discredited.

Lawyers call the government’s stance unprecedented, but also a recognition that a once—secret program is now largely out in the open.

They say it’s the first time the Justice Department has not sought, as its first step, to dismiss a lawsuit over the interrogation program by arguing that it’s too secret to discuss in court. Judges have accepted that assertion, turning aside multiple cases.

The lawsuit at issue accuses the two Air Force psychologists who designed the interrogation program of endorsing torture tactics under the guise of science.