neighbourhoods, churches, schools. they are destroying everything that ensures a normal life, human life. and they want to continue it. knowing that new strikes and casualties are inevitable, nato deliberately decided not to close the sky over ukraine. russian forces are steadily making gains in this war as urban areas are cut off by troops. in the city of mariupol in the south, which is under siege, the mayor says food is running out and there's no water, heating or electricity. the russian advance is also gaining momentum to the east and north, with continued shelling and artillery fire. jeremy bowen has more. 50,000 people a day are passing through kyiv station. it is the gateway to relative safety in the far west, near the polish border. furtherfrom the russians, and further from the people they love. no—one knows how long