The Battle For Ukraine's Cities 36:44

As the battle for Ukraine's cities, including the capital Kyiv,  steps up, the question arises about strategy.  From both sides, what is the aim of the attack and what is the theory behind the defence?  In his regular Tuesday commentary for the Bridge on the Ukraine war, retired foreign correspondent and military analyst Brian Stewart has his thoughts.  Also, a remarkable letter later in the episode from two listeners travelling parts of western Canada.