we believe they're trying to encircle mariupol as well. they have not done it yet. jen? >> john, have you seen any evidence that russian morale among the troops is low? we've seen some reports. have you seen any evidence of that? how would you characterize that convoy, the 40-mile long convoy north of kiev? if it doesn't have tanks in that convoy, where are the tanks? where did they go? >> i don't have perfect visibility on the convoy. we're watching it with much the same imagery that you are. we believe the main purpose of it is resupply. so when you look at the images from the air, you can see a lot of it. they don't look like armored vehicle other than resupply trucks. that's not to say that there aren't combat vehicles in there. we don't have perfect visibility on it. the assessment is it was to help resupply. it's still stalled. it's still stuck. we don't assess over the weekend