 During testimony to the Senate Intelligence Committee in June 2016, Brennan warned of the threat posed by ISIL claiming it had the ability to draw on a "large cadre of Western fighters" and reiterated the threats posed by lone wolf attackers, calling them "an exceptionally challenging issue for the intelligence community".Brennan detailed ISIL's size to the committee, specifying they had more fighters than al-Qaeda at its height and that they were spread between Africa and southwest Asia.In September 2016, the Congress passed the Justice Against Sponsors of Terrorism Act (JASTA) that would allow relatives of victims of the September 11 attacks to sue Saudi Arabia for its government's alleged role in the attacks.