this is cnn breaking news. hello and welcome to our viewers joining us from all around the world and in the united, i am michael holmes at the cnn sis center in atlanta. a sprawling steel factory in mariupol is all that remains of ukrainian forces defending the tra teenagic-port city. they are surrounded by russian troops, but have refused to surrender amid the nonstop shelling and gun battles. russian president vladimir putin has now ordered troops to impose a blockade that, quote, even a fly can t get through, rather than storm the facility. besides sheltering the ukrainian fighters, the kmeks has also been home to hundreds of men, women, and chirp children who are reportedly running out of food and water. the factory owner describes the