During a preliminary hearing, held on 17 September 2019, the prosecution released a transcript from a conversation al-Baluchi had with another captive, when they were in two nearby recreation yards. It had not been known, until the release of this transcript, that the recreation yards contained hidden listening devices. According to an article by Carol Rosenberg, published in "The New York Times", Camp Seven had at least two recreation yards. Captives got a whole recreation yard to themselves, during their outdoor recreation time. But they could hear other captives in nearby yards, and could communicate with them, by yelling.