When Russia's full-scale invasion of Ukraine surpassed 1,418 days last month, it officially exceeded a historic milestone - the same span of time it took Moscow to defeat Nazi Germany in World War II. And unlike the Red Army that pushed all the way to Berlin eight decades ago in what it called the Great Patriotic War, Russia's 4-year-old, all-out invasion of its neighbour is still struggling to fully capture Ukraine's eastern industrial heartland. Firefighters work at the site of a residential building damaged during Russian drone and missile strikes, amid Russia's attack on Ukraine, in Kyiv, Ukraine, February 22,...