Ukraine: 'Clash of Cold War rivalries'
2 March 2014 Last updated at 22:39 GMT
The crisis in Ukraine is one of the most serious confrontations between Russia and the West in recent years. A clash of old Cold War rivalries.
The US Secretary of State John Kerry, warned that Russia could be expelled from the G8, while the head of NATO says Moscow's actions are threatening peace in Europe.
Diplomatic Correspondent Bridget Kendall reports.