There is anecdotal evidence that Russia knew something was about to go down around 9/11 as well. This ties in with the jailed "spy" in Canada story too. A few weeks after 9/11 the Russians revealed that among some Chechen fighters killed they found plans discussing 9/11 type activities. The man in Canada claiming to be an American spy was active in Russia at the time.
It is very possible that the Russians got that info before hand and when they revealed what they had they changed the date of the intel gathering for obvious reasons. It is almost certain that Russia got wind of 9/11 from their war with the Chechens who are backed by al-Qaida. Just last week the FBI released a warning about non-Arab looking Chechens that may try and hijack a plane.
If--if--the Russian knew, why didn't they warn us?
Well candidate for president, Bush ran a platform campaign (which he didn't write but backed) that backed the Chechens over the Russians and another presidential candidate Senator McCain was so pro Chechen that he almost threatened to go to war with Russia to back the Chechens (most of my fellow Republicans have forgotten how pro-Islamic rebels some of our Republican leadership was if the foe was Russia or India or China), and the Democratic candidates of Gore and Lieberman were 10 times worse (the Democrats actually staged 2 wars in support of Bosnian and Albanian Muslims al-Qaida allies against Slavic, Orthodox Christians).
So the Russians were not on very good speaking terms with America when 9/11 happened and were not inclined to share info with us even if they did know something. I am sure American support for the PLO probably also tainted Israeli intel sharing with us.
In all this post 9/11 examination no one is mentioning how high some of our leading figures were for some jihads and how that how 9/11 may have been a "blowback" of some kind?