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This is CBS Eye in the World. I'm John Batsu with my colleague,

Anatol Leven of the Quincy Institute for Responsible Statecraft, to the Black Sea Basin,

to what we know most recently. This is London reporting. Russia could be deploying ships to

blockade Ukraine's ports. Ministry of Defense Intelligence says Russian warship has been deployed

to Black Seas as Moscow pulls out of deal to allow safe passage of Ukrainian grain.

This is a complex story ranging over a vast area of the Black Sea Basin. It can involve Romania

and Bulgaria as outside of the war, but still in the route that would be

traveled by Ukrainian grain if it was not, if it when it does not have access to the Black Sea

into the Mediterranean. The question now is the blockade. Is that just a possibility, a taunt,

or is Russia ready to blockade all grain leaving the Black Sea, inspect all ships,

even civilian ships as possibly carrying illicit cargo? Anatol, what is your measure of the

grain deal? I know you've been away, but you followed the news very carefully. Is this leverage

for Russia because it was seen as a plus for diplomacy when it was in place?

Well, Russia certainly hoped that it would be leverage, but the Russians claim you see that

the West promised that if they agreed to allow Ukraine to export its grain, that the West would

reduce sanctions on Russian fertilizer export in particular and generally relax the financial

controls, which Russia says is making it much more difficult for it to sell its grain.

The West did not do that, and Russia has at the very least used that as an excuse now

...