right now vice president kamala harris is in germany leading the american delegation to the munich security conference set to focus on the russian threat. we have reports this morning from moscow to washington and we begin our team coverage with senior national correspondent alex marquardt in ukraine. alex, what has been the response in ukraine for false flag operations, pretexts for attacks and so-called genocide? >> reporter: laura, there is significant concern not just here but across nato that president putin, as you say, could use what's going on here as a potential pretext or excuse to justify an invasion. that has been warned of by u.s. officials and many others that he could come up with some kind of story or use what's happening