traffic, this family, like many here, decided to get out and walk more than 12 hours to the polish border, where local and international aide agencies are scrambling to mobilize food, shelter, and clothing, including piles of children's shoes for the smallest refugees. we're at the border crossing between ukraine and poland and all day and yesterday we have seen a steady stream of people coming across. the difference is for the first time today, if you look up the hill behind me, we see a line of people going back into ukraine. we talked to women who are going to get members of their family, and a couple of military-aged males who said they are going back in to fight for their country. nearly 30,000 ukrainians have crossed into poland and about 11,000 have gone to romania. because men of fighting age are arred from leaving ukraine, many women and children are making the journey alone. >> i have a five-year-old kid, and i have also my sister, who has two kids, so we are really scared and don't know what will happen here.