NATO emphasized its commitment to Article 5, stating that an attack on one ally is considered an attack on all.

Whether or not Turkey scores a coveted F-35 agreement, the decision by Trump to host Erdogan at the White House is itself a victory of sorts for the Turkish leader. Erdogan was held at a distance by the Biden administration over concerns about Turkey’s relationship with Russia as well as Erdogan's record on human rights.

NATO warned Russia on Tuesday that it would use "all necessary military and non-military tools" to defend itself as it condemned Moscow for violating Estonian airspace in a "pattern of increasingly irresponsible behaviour".

Denmark's defense chief has called a series of unidentified drones being spotted near airports and military installations a "hybrid attack."

The North American Aerospace Defense Command (NORAD) announced Wednesday that Russian aircraft were detected in the Alaskan Air Defense Identification Zone.

European diplomats warned the Kremlin this week that NATO is ready to respond to further violations of its airspace with full force, including by shooting down Russian planes, according to officials familiar with the exchange.

A Spanish military jet with Defence Minister Margarita Robles onboard experienced a GPS disturbance early on Wednesday as it flew near Russia's Kaliningrad exclave on its way to Lithuania, the ministry said,