>> reporter: they're not entirely convinced it is going to happen. i think the ukrainians are having a renewed sense of confidence. that convoy is stalled, it has been stalled for days now because of logistical problems, because of lack of fuel. so it is now apparently according to u.s. military officials a traffic snarl of military vehicles still about 15 miles from kyiv. so the people in the city are not disspirited. they're not disheartened. they're watching the russian's faltering and watching what are on-and-off peace talks. the ukrainians are not convinced the peace talks will achieve much, but they seem to have achieved something already in that the russians are lowering their demand. if you listen to what vladimir putin has been saying since this conflict began and even before, he talked about total