Ukraine crisis: 'Russia violating international norms'
3 March 2014 Last updated at 10:34 GMT
Russia's actions in Ukraine violate "all international norms", Professor Michael McFaul has said.
The former US ambassador to Moscow told the Today programme that the focus of Ukraine should be towards a "long-term vision", with the creation of a new government via a "peaceful democratic process".
First broadcast on BBC Radio 4's Today programme on Monday 3 March.