Perhaps the most underappreciated quote of our era. This is from an interview that Alexander Litvinenko (assassinated FSB turncoat) gave to Poland's Fakt newspaper, in which he discusses Russia's role in terrorism, past and present:
Fakt: Every terrorist you have named is from 'the old staff' of the KGB. Could you name someone from recent history?
A. Litvinenko: Certainly, here it is. The number two person in the terrorist organization al Qaeda, who they are crediting with the series of explosions in London, Ayman al-Zawahiri, is an old agent of the FSB. Being sentenced to death in Egypt for terrorism and hunted by Interpol, Ayman al-Zawahiri, in 1998, was in the territory of Dagestan, where for half a year he received special training at one of the educational bases of the FSB. After this training he was transferred to Afghanistan, where he had never been before and where, following the recommendation of his Lubyanka chiefs, he at once ... penetrated the milieu of bin Laden and soon became his assistant in al Qaeda.
Fakt: Could you hint at least, where this data comes from?
A. Litvinenko: I can. During my service in one of the most secret departments of the FSB, top officials from the UFSB of Dagestan, who had directly worked with Ayman al-Zawahiri ... were called to Moscow and received high posts.
That quote goes nicely with this quote about Ayman al-Zawahiri, from bin Laden's chosen biographer Hamid Mir:
He is the person who can do the things that happened on Sept. 11.