Ukraine. thanks so much, anderson. i m jim sciutto live from lviv along with laura coates in the u.s. so, when you liberate a war-torn city, you are freeing it from its oppressors. that is not what vladimir putin has done in the southeastern city of mariupol, as he twistedly, outrageously is claiming tonight. not only are his forces still surrounding and trapping hundreds of ukrainian civilians and soldiers who have been sheltering in the steel plant, he has now ordered his forces to blockade the area so tight so as not even to let a fly get through. pay attention to how he uses that word fly. he s done it before, dismissing his opponents as insects to be swatted away or force. fact is russian forces are slaughtering people, not liberating them. there is brand-new evidence tonight of more potential russian war crimes. new satellite images from just