perhaps grim chapter could be coming in the next couple of days. the way the ukrainians held back the russians, pushed them back in some cases has been widely praised rightly admired and almost certainly vladimir putin has been seeing that. he's been caught off guard by how much more difficult this has been for his forces but the russians of course still have that overwhelming superiority in numbers and material. the fear i think don is the russians are going to ratchet things up and bring in heavy equipment and a heavy hand and cause more pain. if they go into a city the size of kyiv. how bloody the street to street battles could be doesn't bear thinking about, don. >> michael holms in lviv. now to kaitlan collins. you've been talking to officials about this massive convoy and the possible ratcheting up of forces from the russian side. what are you hearing?