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Military situation in ukraine. >> lending us his military experts air marshal, talk us through the developments of the last 24 hours. one of the key areas we have to look at now. >> well, i think what has been being revealed now is russias plan b. if we look in the southern region, this is where russia has been most militarily successful in its long-standing aim to bring russia through the donbas into crimea. so, you would, note that mariupol is still holding out and weve seen those terrible sce...