key goals. >> the liberation of donbas, ukrainian armed forces suffered considerable damage. air superiority was achieved. the air force and air defense network were practically destroyed. >> near that contested area of donbas russian troops have taken over the city of mariupol and the mayor urging people to flee. 150,000 people are still trapped. 5,000 residents have died in the last month according to the mayor's office since russian's invasion. further to the southwest of the country, there is an entry point to the black sea nikolai. if seized that city would cut off ukraine from much of its coast. an explosion there blasted a hole in a nine story government building. we have now learned at least seven people died in the blast today. most people managed to escape.