Has Russia Attacked America?

Eli Lake has done a series of stories at the Washington Times alleging Russian responsibility for the bombing of the US Embassy in Georgia. Joshua Foust is skeptical. So is Mark Adomanis:

The basic disagreement between the CIA and the State Department on the most important aspect of the entire episode should be a giant red flag to a journalist, and would lead any minimally inquisitive person to ask a number of questions such as: Since Borisov [the bomber] is not in Georgian custody, what is the nature of the evidence that so conclusively proves he was acting under orders?

Videotapes? Audio recordings? A confession from a co-conspirator? And if this evidence from the Georgians is so overwhelming and straightforward, why can’t the State Department and the CIA agree on its interpretation? What specifically led the CIA to attribute Borisov’s activity to the GRU, and what specifically led the State Department to attribute it to a rogue operative? Has the disagreement between the CIA and State occurred from the start, or is it a more recent development?

And, at a higher level, what possible motivation would the Russians have to take the almost unbelievably provocative action of bombing a US embassy? And, finally, why would they do this at a time when, by all accounts, their relations with Washington were improving?