strong. >> reporter: we saw that strength on display by hundreds of mothers traveling alone with their children across the border into poland, their husbands left behind to fight. but not everyone at the medika border krorsing is leaving we have witnessed men going the other way to fight. >> i'm ukrainian going to fight against russian. >> reporter: but for a million other ukrainians, fleeing is the best option to save themselves and their children. for this family, the husband, though, remains with them, even though ukrainian's government has demanded men of his age must stay put. he has been allowed out. his duty is to his family, he says. he is the only breadwinner because his wife's duty is to the children who struggle with disabilities. at the train station, their youngest smiles and clutches her most prized possessions. her old fuzzy tiger and a new keepsake, a handful of gravel