The russians. what makes this port city so crucial for putin? this makes the final piece of the land bridge that the russians have wanted from crimea all the way into the donbas then into russia. so when they have this land bridge, that serves to take this part of the coastline off the table for ukraine and potentially puts in play the western part right here if they pivot and move toward odesa. now let s look at what s being called the alamo of mariupol, the battle for this complex. the iron and steel works complex. it takes up four square miles. it is a sprawling complex of buildings, warehouses, rail tracks, smokestacks, roads. it s got its own port, but also an underground network of rooms, tunnels, and communications systems. as we look at this video, the before and after video, the video before the siege, this after video, what are these