let's continue talking about this high-stakes call with moscow -- matt bodner is live in moscow. thank you for being with me. matt, has amassed troops on the border before without invading ukraine, although they did it in 2014, no problems. how serious is the threat this time around? >> reporter: well, jose, let me put it this way. what we're seeing on the russian/ukrainian border right now might very well be the largest movement of russian troops in many, many years, possibly since the end of the cold war. at the very least, it's the largest movement outside of regularly scheduled exercises. that's a key point to hold on to. you mentioned the buildup earlier this year back in april. a lot of that was couched, at least initially, as part of regular exercise movements and in many places, that did stack up. but one thing that was really interesting to watch in that last buildup was, there's a lot of attention paid towards, let's say, front-line troops, tanks, artillery, the really eye-catching items, but you didn't see the kind of logistical back end of an invasion. so i think a lot