The Ukrainian president was speaking at a summit to mark the third anniversary of Russia's full-scale invasion.

As we hit the three-year mark since the invasion of Ukraine by Russian forces, Europe and NATO appear to be at their most fractured and vulnerable.

President Donald Trump’s phone call with Russian President Vladimir Putin on Feb. 12 marked the beginning of the end of the three-year war in Ukraine. It also opened a new phase in America’s trans-Atlantic relations.