looked like an older gentleman from the video. kherson was the first strategically important ukrainian city to fall. it has been occupied by russian forces for about two weeks now. well, for the hundreds of thousands of people who may still be in mariupol, it is clear there is no safe place to escape the russian assault. phil black reports that their days are marked by sheltering in what's left of the buildings and confronting the bleak landscape outside. and as always, a warning, some of what you are about to see is disturbing. >> reporter: between the shelling and air strikes in mariupol, people emerge to do what they can for the living and the dead. this man says he hopes these graves are only temporary, that the bodies will be reburied someday. they spend much of their time sheltering in what remains of the buildings and often beneath them. basements offer some protection but little comfort.