As Trump questions the loyalty of a NATO ally, CBS News joins one of its warships taking part in a drill far from home, aimed at defending Europe and the U.S.

NATO's ability to deter Russia has taken a huge hit as trust within the alliance erodes. European allies and Canada are investing billions to support Ukraine and boost defense budgets.

The Russian president told a Security Council meeting on Wednesday, "What happens to Greenland is none of our business."

Russia carried out a major overnight attack on Ukraine in what President Volodymyr Zelenskyy said Tuesday was a broken commitment to halt striking energy infrastructure as the countries prepared for more talks on ending Moscow’s 4-year-old full-scale invasion.

Putin has long sought to undermine the western alliance that he sees as a threat.

Russian Foreign Minister Sergey Lavrov says the bid by U.S. President Donald Trump to take over Greenland poses a “deep crisis” for NATO and raises questions about the alliance’s preservation as a single military-political bloc.

President Donald Trump runs hot and cold in his relationship with his Russian counterpart Vladimir Putin — often at the same time

NATO Secretary General Mark Rutte has issued a stark warning about Europe’s ability to keep pace with Russia’s rapidly expanding defense spending, saying the structure of Russia’s economy allows it to outspend European nations with ease.

NATO chief Mark Rutte and other European leaders have issued repeated warnings in 2025 about a possible Russian attack on NATO countries in the coming years. Some experts doubt Russia’s capability or intent to attack soon, but say Putin may provoke ...

A Ukrainian officer warned that NATO would face heavier losses than Kyiv in a war against Russia. The rise of drones has unleashed carnage in Ukraine and made casualty evacuations difficult. NATO is closely watching the war and exploring solutions to help ...

President Donald Trump sounded off on NATO on Wednesday morning for being cheap, ineffective, and weak without the USA leading it, arguing that Russia would have taken over “ALL OF UKRAINE” if the U.S. did not serve as NATO’s enforcer. The president ...