With Russia’s invasion of Ukraine in its fourth year, and the US wavering in its commitment to Western European security, there’s speculation that Russian President Vladimir Putin is testing NATO’s collective security arrangements.

THE HAGUE, Netherlands (AP) — President Donald Trump on Tuesday injected some uncertainty over whether the U.S. would abide by the mutual defense guarantees outlined in the NATO treaty as he headed to its summit — comments that could revive long ...

Polish and other Nato fighter jets have been scrambled overnight to shoot down Russian drones and missiles over Polish territory. Some commentators are suggesting these are wayward drones meant for targets in western Ukraine.