Due to his prolific writings on strategic and political issues, and his guerrilla warfare experience, Nasar is a popular lecturer and to a certain degree an unofficial adviser for a wide range of jihadi groups in Afghanistan. Organizationally, however, he has remained a rather independent figure. While some reports have linked him to Abu Musab al-Zarqawi, who later led al-Qaeda's component of the insurgency in Iraq, his network of contacts was much wider, and included jihadis from Morocco, Algeria, Libya, Egypt, Syria, Lebanon, Iraqi Kurdistan, Saudi Arabia, Yemen, Uzbekistan, and elsewhere. Media reports have also alleged that one of his associates, the Moroccan Amer Azizi (Uthman al-Andalusi), had met September 11 organizers Mohamed Atta and Ramzi bin al-Shibh in Tarragona, Spain, weeks before the attacks, but this seems to be incorrect.