FLEEING THE FIGHTING.

WHIT JOHNSON (ABC NEWS) (Off-camera) Terry Moran, leading us off. Thank you. Next, tonight, the human toll and the soaring new numbers from the UN on Ukrainians fleeing the fighting. Nearly four millions Ukrainians have become refugees, now, more than half going to Poland. Families arriving today, greeted at the border, where aid stations are set up, and they're met by workers. ABC's Mireya Villarreal is near the Ukrainian border for us tonight, with an American doctor providing medical care to those in need. [ABSTRACT FROM PUBLISHER]