for more, we are joined now by kimberly marten. she is a russian scholar and a professor at barnard college and columbia university. so you know what's interesting is those two were just the most recent in a long list of aggressive moves that russia has been take. just a few weeks ago sweden was looking for a submarine off their coast. they confirmed there was a foreign sub. the suspicion is certainly on the russians. we have had greatest flights near the u.s. simulating bombing runs that could work for new york, chicago. what's he doing? >> i think part of what's going on is putin is trying to take attention off of the problems that the russian economy is facing. the singleses are working much better than than many people predicted they would, and they're having real impact on the russian oil industry, which is one of the major contributors to the russian budget. and the united states and the europeans are holding together on those sanctions, much better than people thought they were going to. and now, even proposing more sanction