It s the source of a pentagon scramble. the united states is now promising to deliver heavier and deadlier weaponry. helicopters, howitzer cannons and more. overnight ukraine said it put a major military win on the scoreboard. russia s premier warship in the black sea sustained major damage. ukraine claims it struck it with a cruise missile. russia blames the damage on an accidental fire. the pentagon today says it has not determined the cause and says the ship is still afloat, but in need of major repairs. mariupol remains under attack on all sides. debris lines just about every nook and cranny of that city. ukrainian officials say thousands are dead. russian state media claims this is battlefield progress. a video apparently showing ukrainian soldiers surrendering. cnn is unable to determine if this is real or if it is kremlin propaganda. we start our coverage on the front lines in ukraine in lviv with cnn s matt rivers. what s the latest?