that u.s. intelligence asset warning of military deaths but a staggering number of well as many as 50,000 ukrainians could die in a conflict. erin mclaughlin is in the capital of kyiv. >> reporter: on the brink of war, residents inbattle that u.s. intel full-scale invasion by russia the potential toll immense. 25,000 to 50,000 ukrainian civilians could die and another 1 to 5 million may be forced to flee their country, many to nearby poland. elina says she's not going any wrchlt she's training on the weekend with her two teenage boys. >> are you scared for your family? >> we're all going to die some day the thing that you can do is you can live your life in dignity. >> reporter: these ordinary citizens are learning to handle weapons, administer first aid and evacuate the wounded. they're learning potentially