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It's been one week since Russia invaded Ukraine and attacks are intensifying on key cities.

Russian advances have slowed in many places, revealing an army struggling to make progress.

Reports suggest Russian troops near the capital Kyiv have barely advanced in the past 48 hours.

Instead, bombardments have started, as seen in the seizure of of a key port city in southern Ukraine, Kherson.

Does the Russian military has the will, means and agility to finish off this campaign?

Diplomatic and defence editor Mark Urban has analysed dozens of Russian prisoner of war interviews.