U.S.-backed forces in Syria have a militant linked to the September 11 terrorist attacks in their custody, according to the Pentagon. The Syrian Democratic Forces (SDF), an alliance of militias in Syria, captured Mohammed Haydar Zammar a month ago, the Pentagon said Thursday, according to Reuters. “We can confirm that Mohammad Haydar Zammar, a Syrian-born German national, was captured more than a month ago by SDF partners as part of their ongoing operations to defeat ISIS inside Syria,” said Eric Pahon, a Pentagon spokesman, using an acronym for the Islamic State. “We are working with our SDF partners to obtain additional details,” he added. Zammar is suspected to have inspired and recruited some of the hijackers responsible for the Sept.