Since 1999 and 2000 onwards , Pakistan 's intelligence community had been tracking and monitoring Mehmood whose bushy beard advertised his deep attachment to Taliban . After the terrorist attacks in the United States , the FIA launched an active criminal investigations against him , leveling charges on unauthorized traveled to Afghanistan . Director CIA George Tenet later described intelligence reports of his meeting with Al Qaeda as " '' frustratingly vague '' . " When asked by Pakistani and American investigators about nature of UTN 's work and discussions , Mahmood told that he had nothing to do with the al-Qaeda and was only working on humanitarian issues like food , health and education . Investigators from ISI and CIA were astonished and surprised when finding out that Mahmood knew nothing on nuclear weapons as contrary of being a nuclear engineer , and were unable to construct one by themselves
terrorist attacks
September 11 attacks
Sultan Bashiruddin Mahmood