On February 23, 1998, al-Zawahiri issued a joint fatwa with Osama bin Laden under the title "World Islamic Front Against Jews and Crusaders". Zawahiri, not bin Laden, is thought to have been the actual author of the fatwa.
Bin Laden and al-Zawahiri organized an al-Qaeda congress on June 24, 1998. A week prior to the beginning of the conference, a group of well-armed assistants to al-Zawahiri had left by jeeps in the direction of Herat. Following the instructions of their patron, in the town of Koh-i-Doshakh, they met three unknown Slavic-looking men who had arrived from Russia via Iran. After their arrival in Kandahar, they split up. One of the Russians was directly escorted to al-Zawahiri and he did not participate in the conference.