A U.S. Department of Defense spokesman said the miles-long Russian military convoy heading to Kyiv, the Ukrainian capital, is stalled. “They haven’t, from our best estimates, made any appreciable progress in the last 24-36 hours,” Pentagon spokesman John Kirby said on Wednesday of the Russian forces moving towards the capital. “Nothing very significant.” Satellite imagery from Maxar showed what appears to be a 40-mile-long convoy of Russian tanks, artillery, and military equipment outside of Kyiv. Kirby told reporters that the stall is likely due to Russian forces deliberately “regrouping themselves and reassessing the progress that they have not made and how to make up the lost time,” adding that there appear to be “logistics and sustainment challenges” amid resistance from the Ukrainians. Kirby noted that in southern Ukraine, Russian forces are facing less resistance and are seeing greater success. But the Pentagon’s “assessment is, as they get closer to these two population …