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.

A group of military veterans and defense experts urged European leaders to boost support for green fuels ahead of their summit in Brussels.

Two Russian military aircraft entered NATO member Lithuania's airspace on Thursday for about 18 seconds, Lithuania's military said.

Trump has pushed NATO members to spend at least 5 percent of their GDP on national defense. At a NATO summit in The Hague in June, most members agreed to a spending target of 5 percent of GDP — 3.5 percent on core military expenditure and 1.5 percent in defense-related areas such as military mobility by 2035.

The U.K. is prepared to deploy British troops to Ukraine to secure a future peace deal in the country, British Defense Secretary John Healey has said, ahead of a planned meeting between President Donald Trump and Russian President Vladimir Putin.

NATO Secretary-General Mark Rutte on Wednesday praised President Trump’s decision to not provide Ukraine with Tomahawk missiles in its war with Russia. Speaking with CNN hours after meeting

Putin oversees nuclear drills testing Russia’s missile and bomber readiness as NATO begins its Steadfast Noon nuclear exercises in Europe