that s the mosque we used to pray in, yes, yes. reporter: five times every day, devout muslims turn towards the holy city of mecca to pray. osama was always among them. for him it was a must. reporter: it is something of a mystery, why this son of a wealthy family was drawn to such rigid religious beliefs. over time batarfi saw his best friend become even more of a fundamentalist, striving to live according to his ultrastrict interpretation of the holy koran. no pictures, no music, and after that, not even tv. unless there s news. reporter: osama s religious devotion went beyond living a simple pious life.
was no question, osama was in charge. that s the mosque we used to pray. yes. reporter: five times every day, devout muslims turn towards the holy city of mecca to pray. osama was always among them. for him, it was a must. reporter: it is something of a mystery why this son of a wealthy family was drawn to such rigid religious belief. over time, batarfi saw his best friend become even more of a fundamentalist, striving to live according to his ultra-strict interpretation of the holy koran. no pictures, no music. and after that, no tv, unless there s news. reporter: osama s religious devotion went beyond living a simple pious life. he had begun to believe it was his duty to prepare to one day fight for and defend islam. osama s training ground, the
wealthy family was drawn to such rigid religious belief. over time, batarfi saw his best friend become even more of a fundamentalist, striving to live according to his ultra-strict interpretation of the holy koran. no pictures, no music. and after that, no tv, unless there s news. reporter: osama s religious devotion went beyond living a simple pious life. he had begun to believe it was his duty to prepare to one day fight for and defend islam. osama s training ground, the desolate saudi desert. the son of a multimillionaire was now preparing for a life without luxuries or even basic essentials, a life as a holy warrior. i hear from his brothers that
the holy city of mecca to pray. osama was always among them. for him, it was a must. reporter: it is something of a mystery why this son of a wealthy family was drawn to such rigid religious beliefs. over time, batarfi saw his best friend become even more of a fundamentalist, striving to live according to his ultra-strict interpretation of the holy koran. no pictures, no music. and after that, no tv, unless there s news. reporter: osama s religious devotion went beyond living a simple pious life. he had begun to believe it was his duty to prepare to one day fight for and defend islam. osama s training ground, the desolate saudi desert. the son of a multimillionaire
osama was always among them. for him, it was a must. reporter: it is something of a mystery why this son of a wealthy family was drawn to such rigid religious belief. over time, batarfi saw his best friend become even more of a fundamentalist, striving to live according to his ultra-strict interpretation of the holy koran. no pictures, no music. and after that, no tv, unless there s news. reporter: osama s religious devotion went beyond living a simple pious life. he had begun to believe it was his duty to prepare to one day fight for and defend islam. osama s training ground, the desolate saudi desert. the son of a multimillionaire