defend odesa and everything will be okay." then a siren again. off the coast are two ukrainian naval ships pacing worriedly. at any time the russian amphibious landing could hit. they clear out fast although strike a pose of defiance. >> [ speaking foreign language ]. >> thank you. >> reporter: soon the alert clears and the church bells begin to sound friendly again as people thin out underground. but the youngest are the last to leave, and for kira, age 3, these up and down days in the dark are too much. nastia is bouncier. "i've lost my train toy," she says. "oh, wait.