Probably their reaction to these comments from today:
US President Barack Obama has warned Moscow that any military intervention in Ukraine would be "deeply destabilising", as Kiev claims Russian troops have invaded.
He said: "The United States will stand with the international community in affirming that there will be costs for any military intervention in Ukraine.
"We are now deeply concerned by reports of military movements taken by the Russian Federation inside of Ukraine."
I'm not really worried, I don't think Russia is stupid enough to do anything. All Putin wants is the Ukraine, or at least part of it (not saying that it isn't a big deal). He knows if he started a war no one would win.
