U.S. envoy Steve Witkoff calls Ukraine and Russia's exchange of 314 prisoners "tangible progress," but acknowledges a lot of work left to end the war.

The Ukrainian president also said a large number of people were "officially missing", meaning the total death toll is thought to be much higher.

Trump's Greenland focus highlights urgent Arctic security needs as Sen. Sullivan reveals new U.S. defenses against Sino-Russian threats in Alaska.

A Russian official said Moscow is ready to respond with military measures if the United States deploys its missile defense program to Greenland.

U.S., Russian and Ukrainian negotiators are back around a table for a second round of technical talks, but in Kyiv, Russian bombs bring suffering and skepticism.

Ukrainian President Volodymyr Zelenskyy urged "maximum pressure" on Russia after Moscow fired hundreds of drones and missiles into Ukraine.

Russia attacked Ukraine’s capital Kyiv with ballistic missiles early on Tuesday, local authorities reported, following a week-long pause in strikes on major cities and infrastructure agreed to by Russia and the US as Ukraine grapples with plummeting winter temperatures.