volunteer? >> we came to volunteer because we -- because ukraine, ukraine is the strong nation. we feel that all ukrainian are united. >> zachary and keril, friends and university students say they're ready to fight. they're just 19. this volunteer told us he's an excellent sharp shooter. he's 73. >> translator: i'm a bit ill but i'm ready to die for ukraine. these are similar things. >> reporter: the challenge at recruiting posts in lviv, many waiting days to sign up. at the blood bank here, too much blood. they're turning donors away now. >> translator: blood donation center, we have many donors, around 400 people a day. >> reporter: as russian forces invade their country, ukrainians are helping anyway they can. in the north, families are