For days, a massive Russian military convoy has sat, largely stalled about 15 miles outside the the Ukrainian capital, Kyiv.
Nine days into the war, the expanse of Russian supply trucks, troops and weapons has been plagued with fuel and food shortages and logistical challenges, including weather and mud.
Ukrainian troops have managed to attack and incapacitate some vehicles at the front, creating a traffic jam. But the Russians have largely shielded the convoy from attack by air, according to Western officials and analysts.
The convoy's lack of measurable progress has triggered questions about the short- and long-term implications and what it says about Russia's war planning.
The convoy, which stretches for as much as 40 miles was moving steadily at the onset of the war. But this week, progress appeared to all but stop.
Reports immediately centred on fuel and food shortages. And, a senior US defense official said Ukrainian troops have been targeting the convoy with ground fire.
The most significant impact of those attacks is that they struck vehicles at the front of the convoy, essentially creating a roadblock.
Also Watch| Ukraine: 4 maps show Russia's advance in first week of war; how Kyiv, Kharkiv, Kherson were encircled