like how i customized this scarf? check out this backpack i made for marco. only pay for what you need. ♪liberty. liberty. liberty. liberty.♪ one person sure to be watching president biden's address from warsaw when he delivers it later today, vladimir putin. retired lieutenant colonel alexander vindman is joining us now, the former director for this region and russia at the national security council, forced out by president trump after he was a key witness in the first impeachment. he's also an author of the "new york times" best selling memoir "here right matters." colonel vindman, it's great to see you again. let's talk about what we've seen today, though. the fact that there was smoke erupting in lviv, you know, just across the border.