NATO's deputy commander in Europe is warning that Russian President Vladimir Putin is becoming increasingly reckless as the war in Ukraine drags on and as he seeks to divide Western allies. Air Chief Marshal Sir John Stringer spoke to The Associated Press Tuesday at a security conference in Estonia amid warnings from some European leaders that Moscow is planning to test NATO’s collective defense pact with bolder attacks that have already included sabotage and espionage. Leaders from Poland and France have suggested Moscow might test NATO with deliberate drone or missile strikes. However, officials in Estonia, Latvia, and Lithuania remain cautious about a serious escalation. Stringer emphasizes the need for NATO to avoid overreacting, as Putin aims to provoke the alliance.

The United States, Denmark, and Greenland have signed an agreement to strengthen security in the Arctic and North Atlantic. President Donald Trump signed the deal during the U.N. General Assembly in New York on Tuesday. The signing follows Trump's earlier announcement that he planned to bolster U.S. military presence in Greenland while keeping it under Danish and Greenlandic control. Trump has repeatedly expressed a desire for Greenland to become part of the U.S., causing tensions. The agreement recognizes Greenland's sovereignty and aims to boost security for all parties involved. The U.S. military presence in Greenland has decreased significantly since 1945, and currently has around 200 troops on the Pituffik Space Base.