They'd argue that their security also depends on their influence in those countries which surround their borders. To that extent they'll understandably not want what's going on in Ukraine to have a domino effect.
Quote:
Ukraine's interior minister has accused Russian forces of occupying Sevastopol airport in the autonomous region of Crimea.
Arsen Avakov called their presence an "armed invasion".
But Russia's Black Sea Fleet has denied that Russian servicemen are taking part.
The other main Crimean airport, Simferopol, was also occupied by armed men on Friday. The men are thought to be pro-Russia militia.
The Ukrainian parliament has called on the United Nations Security Council to discuss the situation in Crimea.
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http://www.bbc.co.uk/news/world-europe-26379722