goes into a nato country or goes elsewhere, these kinds of penetration into the airspace of a nato ally is the kind of mistake and the kind of issue that concerns nato, concerns the nation as well, because what we don't want to see is a mistake being made, gunfire being exchanged, perhaps a russian aircraft being shot down. something that brings the alliance in, because an allied nation has had its borders penetrated by russia. so that kind of thing is of great concern, and what nato has to do is make sure we can identify, is this really a threat, is this an attack, or is this a mistake like the last drone incident was. we have to be a cool head about these things. >> there have been several mistakes in eastern europe since the invasion of crimea. but let's focus on these demands, according to turkish officials, coming from vladimir putin.