Former Pakistani spy chief Asad Durrani, who collaborated with an Indian counterpart in a book that touches on Pakistan's role in Afghanistan and Kashmir, has been stopped from leaving the country and put on the no-fly list. Retired Lieutenant General Asad Durrani headed Pakistan's Inter Services Intelligence (ISI) from 1990 to 1992. On Monday, he was placed on the Exit Control List (ECL), which stops him from leaving the country.