Doyle McManus: The US has a big stake in how the Ukraine war ends; it’s likely to be paying a lot of the cost

Russia’s invasion of Ukraine, now in its seventh week, shows no sign of abating. Vladimir Putin’s army has abandoned its assault on Kyiv, Ukraine’s capital, but is launching a new offensive in the country’s east. Ukraine’s allies, led by the United States and Britain, have stepped up their supplies of tanks and antiaircraft weapons.