leave. >> hours after i filmed that interview with that man, dmytro, his wife got a phone call from her mother. it's very hard to get a call in and out of mariupol right now because most of the cell phone networks have been turned down. and the mother was weeping and saying good-bye because she did not think she would survive the night's artillery bombardment. don? >> ivan watson, thank you very much. ana? >> don, we'll check back with you all in a moment. let's talk about the military strategy here and the state of play. u.s. defense officials are telling us the u.s. has been unable to even identify a designated command er responsibe for leading the war in ukraine on the russian side, which likely explains what we are seeing play out. with us is cnn military analyst colonel cedric leighton. here we are, week four. walk us through russia's strategy right now as you see it, especially based on what