NATO Secretary-General Mark Rutte says pressure and sanctions are changing Vladimir Putin's calculus as Russia deals with heavy military losses in Ukraine as the war continues.

Russia appears to have been deterred by NATO's firm response last month to incursions into Polish and Estonian airspace, but Moscow is expected to continue testing boundaries, the U.S. general serving as NATO's top commander said on Tuesday.

Polish and allied air forces were activated as Russia struck targets in Ukraine, prompting temporary closures of Radom and Lublin airports.

President Donald Trump said Tuesday that Ukraine could restore its borders from before Russia’s invasion and that he believes NATO member countries should shoot down Russian aircraft if they enter their airspace,

Croatia’s parliament has voted to reintroduce compulsory military service in the European Union and NATO member country