Well, I think the Russians have played now for some time, the role of providing cover for Bashar al-Assad's behavior. The alternative explanation that the Russians put forth is simply not plausible. Not only is not plausible we know, from our own information and open source information, that their alternative explanation is simply not credible.
So, there's little question as to who is responsible for these attacks, it was Bashar al-Assad. And I think the Russians need to think more carefully about the commitment they made under the Chemical Weapons agreements to be the guarantor that these weapons would be seized, they would be removed, they would be destroyed.
And since they are Bashar al-Assad's ally, they would have the closest insight as to the compliance. So regardless of whether Russia was complicit here, whether they were simply incompetent, or whether they got outwitted by the Bashar al-Assad regime, you would have to ask the Russians that question. But clearly they have failed in their commitment to the international community.