just made a surprise visit to a children s hospital in kyiv to visit orphans who lost their parents from the russian bombings in mariupol. meanwhile, after meeting with the u.n. secretary-general in moscow, russian president vladimir putin agreed in principle to a plan to evacuate citizens from that steel plant in mariupol. cbs kris van cleave reports tonight from kyiv. reporter: putin continues to build up forces in ukraine s east, but now, signs of russian aggression moving west, starting with ukraine s biggest port city of odessa. the scene of recent missile strikes. the latest taking out a key bridge to romania, a nato ally. this is ukraine s last coastal stronghold. you lohis ciy, and you lose this sea. and possibly the war. odessa is also on the way to transanistria, the pro-kremlin breakaway region of moldova, where russian troops are based. and for two days, the scene of