Moscow Airport Bomb: Suicide Bombers Were Part Of Squad Trained In Pakistan -- The Telegraph
The two suicide bombers who carried out the Moscow attack were thought to be part of a suicide squad trained in Pakistan's al-Qaeda strongholds sent to the capital to target the city's transport system.
Russian security services warned in December that there were two attack teams primed to carry out attacks, sparking fears there could still be terrorists at large who were prepared to carry out another attack.
Intelligence sources said that one of the squads was likely to have established a base, at a house in Moscow, where the suicide belts to be used in attacks were assembled.
Read more ....
Update: Informants had warned of plan to attack a Moscow airport -- Sydney Morning Herald
My Comment: If these reports are true, it indicates a massive intelligence failure on the part of the Russians.