THE CHALLENGES are flying in. With no ceasefire in sight, Ukraine is hunkering down for protracted war. The news from the front lines is not good. Russian forces are on the verge of turning Sumy, a city with a pre-war population of 250,000, into a grey zone. A bloodbath continues in the Donbas as Russia presses forward. Record numbers of Russian drones and missiles rain down on Ukraine’s big cities, sometimes more than 500 in a single night.