march. this, the burned out remains of an apartment building in a kyiv suburb. also just outside kyiv, smoke and ash choke the city. the destruction grows every hour as russia bombards the capital from all sides. kharkiv now a shell of itself. it is hard, hard to find a window that is not shattered. in the south, signs the ukrainian front line is breaking. mariupol remains under ukrainian control but the city is quite literally on fire. also russian forces now occupy the nuclear power plant in endohar after a fierce firefight. its workers operating the facility at gunpoint. the allies saying the nato enforced no-fly zone is off the table, that even though nato's chief says there's no doubt russia is using illegal weapons of war. cluster bombs. let's get the very latest from cnn correspondents on the ground. we start on the southern coast