The Russian convoy heading towards Kyiv, the Ukrainian capital, remains stalled, Press Secretary John Kirby said in an update on Monday. The convoy, which stretches for as much as 40 miles from near Prybisk in the north to the southern end near the Antonov airport, was moving steadily south at the onset of the war. But last week, progress appeared to all but stop. “It’s a very, very long convoy. We don’t even know if it’s all, we can’t even say that, that it’s all one convoy and not several. But it does remain as our best assessment as it remains stalled,” Kirby said during a press conference. The Pentagon believes the convoy purpose for heading to Kyiv is to “resupply,” Kirby said, noting that the Pentagon doesn’t have “perfect visibility” on the convoy. “When you look at the images from the air, you can see a lot of it …