orange tag with minimal details name, birth date and their most urgent medical need. we were able to track down four of the children now a kyiv city heart center. over shaky video connection his staff told us of their harrowing journey. all the children were packed across just four ambulances with only two doctors among them. in the car to and from sumy to kyiv during the six hours with our doctor, just the driver. reporter: now the babies are receiving the medical attention they require, but with russian forces shelling kyiv, they re still not safe. nurse oxana has a simple plea. children, don t die. reporter: you don t want children to die. yes, yes.