What a difference a year makes. As the world marks the first anniversary of the war in Ukraine, Zelensky's military has performed far better against Russia than even some of its staunchest supporters expected when the war began. And Putin's illegal invasion of a sovereign neighbor has rallied the West to Kyiv's cause.

Ian Bremmer is on the ground in Germany for the annual Munich Security Conference to ask world leaders how much further the West is willing to go in its support for Ukraine.