In 1990s , the ISI and FIA , in many ways , were at war in the poverty-stricken landscape of Pakistan politics . The ISI used its Islamic guerrillas as deniable foot soldiers to strike at FIA credibility , and according to published accounts , the FIA turned to Israeli Mossad and Israeli Intelligence Community through Pervez Musharraf to helped down the terrorist networks in the country . Throughout the 1990s , the intelligence community remained under fire and competition in each services for credibility . After the September 11 , 2001 , the attacks in the United States history , the FBI launched the largest investigation in its history and soon determined that the hijackers were linked to al-Qaeda , led by Saudi exiled Osama bin Laden . Same as just after 9/11 attacks in the United States , the FIA gained credibility over the ISI in the United States . The FIA and ISI were also mentioned in '' The Path to 9/11 '' television series
9/11 attacks
September 11 attacks
Federal Investigation Agency