US vows to defend ‘every inch’ of Nato territory after Russian drones enter Poland - US calls Russia’s Polish airspace violations ‘alarming’

The latest massive aerial attack on Ukraine hit a new milestone in the continuing escalation of Russian bombardments, after Poland announced that it had closed airports and downed Russian drones in its airspace overnight on Sept.

Article 5 is an alliance-bound agreement between NATO nations in the case of an attack, as tensions between Russia and Poland increase.

Lithuania is "ready" to shoot down any more drones that enter its airspace, the country's defense minister told ABC News.

NATO on Thursday said all its members were finally set this year to hit the alliance's previous defence spending target of two percent of GDP -- as they gear up for a far more ambitious goal.The new target replaces the alliance's former military spending goal of two percent that was first set back in 2014.

Military capability of Western alliance remains 'formidable' despite questions around untested 'mutual assistance' agreement as Trump pivots away from Europe

Article 4 allows member states to start a formal discussion within the alliance about threats to their security. It does not commit the alliance to military action.

NATO fighter jets shot down multiple Russian drones that violated Polish airspace during an attack on neighboring Ukraine early on Wednesday, as the military alliance denounced Moscow for “absolutely dangerous” behavior that ratcheted up tensions to a new level.