Assassinated former FSB secret service officer Alexander Litvinenko alleged, among other things, that during this time, al-Zawahiri was indeed being trained by the FSB, and that he was not the only link between al-Qaeda and the FSB.
Nu myrdede, tidligere FSB-agent Alexander Litvinenko hævdede, at Zawahiri under sit ophold i Rusland blev trænet af FSB samt at han ikke var den eneste forbindelse til Al-Qaeda.