blaming the united states, and suppressing support for russia. also russia has expressed support for climate change over to taiwan. allowed in the far east by russia's border, there are pro-russian separatists who could spearhead a russian attack. they have stepped up artillery training. >> does that worry you? that their training for something? >> -- because it's expensive. i think they are preparing for something. for what's? we do not know. >> we are very close to the russian border, and ukrainians are telling us that they are maximizing their restraint. so they don't give them an excuse to evade. they said they are prepared for a possible olympics surprise. richard engel, nvc news, ukraine. >> thank you richard who continues to be on the front lines of that story.