Russian forces appeared to make progress from the northeast in their slow fight toward Ukraine’s capital, while tanks and artillery pounded places already under siege with shelling so heavy that residents of one city were unable to bury the growing number of dead. In Mariupol, unceasing barrages into the city have thwarted repeated attempts to bring in food and water and evacuate trapped civilians. On Friday, an Associated Press photographer captured the moment when a tank appeared to fire directly on an apartment building, enveloping one side in a billowing orange fireball. A deadly strike on a maternity hospital there this