from there tonight. jack, it's good to see you safe. i've been hearing your incredible reporting from kharkiv on the area around it. to situated yours, tell us where kharkiv is, it's significance, and what you saw there? >> thanks for having me. kharkiv's ukraine's second city. this is the analog, i guess it would be chicago or los angeles to key's new york. is a very large university city, there's over 38 institutions of higher education. i spoke to students from basically all over the world at the train station few days ago. this is a massive cosmopolitan city, but it's located just about 25 to 30 miles away from the russian border. and from the site on the russian border that was subject to some of the largest russian armor and military buildup.