There is no doubt about that. I hope that I made it clear in my statement, but I am happy to restate our certainty about Russian involvement in the violence and disorder that have taken place in eastern Ukraine. What has happened does not have the characteristics of spontaneous protest. The level of equipment, training and co-ordination involved demonstrates that there is outside intervention. Ukraine is not, of course, a member of NATO, but I am sure that were such things to happen in a NATO member country, it would be able to invoke article 5 of the NATO treaty.