there. and izume as well, there s bombing in the area that makes it difficult to open up a corridor and get things out and obviously desperately, desperately needed supplies in, kate. just to be clear and transparent on everyone, in the city of mariupol, we are continuing to gather information on the ground. this is a city that has been under attack for days now. we re going to be bringing new information as soon as we get it. at the same time, scott, i wanted to ask you about the other really terrifying situation that ukraine officials are warning about. the concerns at the chernobyl nuclear site which has been knocked off the power grid. what are you hearing about this? reporter: kate, so the ukranian nuclear regulator already didn t have access to the remote sensing system or the remote monitoring system. now two power lines into the chernobyl plant had been knocked