Friday marks 100 days of war in Ukraine. During that time, the planet witnessed death, destruction and displacement on a massive scale — neighborhoods reduced to rubble, with hospitals, schools and railways damaged. It’s very difficult to accurately count the human toll. President Volodymyr Zelenskyiy said on Thursday that “at least tens of thousands” of Ukrainians have died. As for the toll on Russian troops, that’s even harder to estimate. The World’s Daniel Ofman reports.