"I am hopeful that the discussions that Secretary Kerry had with Foreign Minister Lavrov as well as some of the other players in this can yield a concrete result.
"And I know that he is going to be working very hard over the next several days to see what the possibilities are there," Obama told reporters yesterday, before a Cabinet meeting at the White House.
Kerry is leading an interagency team to discuss the modalities of transfer of Syrian chemical weapons to international control.
In Geneva, Kerry told reporters that he has seen reports that the Syrian regime has suggested that as part of the standard process they ought to have 30 days to submit data on their chemical weapons stockpile.
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"We believe there is nothing standard about this process at this moment because of the way the regime has behaved, because not only the existence of these weapons, but they have been used," Kerry said.
Kerry said the expectations from both the US and Russians are high.
"Expectations are high. They are high for the United States, perhaps even more so for Russia to deliver on the promise of this moment. This is not a game, and I said that to my friend Sergey when we talked about it initially," he said.
Noting that diplomacy is the first preferred option for the Obama Administration, Kerry said it is too early to say if this would succeed.
"President Obama has said that again and again. Now, it's too early to tell whether or not these efforts will succeed, but the technical challenges of trying to do this in the context of a civil war are obviously immense.