I do have to wonder who motivated the Chechen Tsarnajev brothers to commit the bomb attacks in Boston? Hopefully their contacts can be tracked.

This plays suspiciously into Putin's hands and SVR&FSB has in the past shown scant recard to human lives when instigating violence to justify government policy.

SVR&FSB might - although this is clearly a far-fetched conspiracy theory - have pretended to be a link to Jihadists and encouraged the brothers to turn from Chechen nationalist aspirations to supposedly serve global Jihadism.

If FBI informants can pretend to represent al-Qaida then why not SVR&FSB agents?