NATO Secretary General Mark Rutte delievered remarks urging for a united European-American front against aggressors in Moscow, Beijing, Pyongyang and Tehran.

Secretary of State Marco Rubio called on Russia to take meaningful steps toward resolving the Russia-Ukraine war, while Estonian Foreign Minister Margus Tsahkna warned that Russia's aggression is strengthening European unity and resolve.

U.S. allies called an emergency meeting of the U.N. Security Council after a series of incidents raised alarm about growing Russian threats to Europe.

Without firing a shot, Putin has over the past week managed to bring the war in Ukraine to NATO’s European borders.

Russian Foreign Minister Sergey Lavrov warned, 'Any aggression against my country will be met with a decisive response.'

These incursions, said Politico, raise “difficult questions” for the Nato alliance. Although “Moscow insists it’s done nothing wrong”, Poland has shot down some of the drones that flew over its skies, and several Nato nations are warning that “they’re ready to shoot down Russian aircraft entering their airspace”.

NATO member Poland has called for the U.S.-led alliance to consider a no-fly zone over Ukraine since nearly 20 Russian drones crossed over into Poland early on September 10 in the midst of extensive Russian attacks on neighboring Ukraine. About three are thought to have been shot down in operations backed by other NATO countries.

Russian drones and missiles have frequently breached NATO airspace in the past. Indeed, Ukrainian officials have complained that their allies have chosen to turn a blind eye to previous incursions. In late August a Shahed drone crashed in a cornfield in eastern Poland,

Estonia, Lithuania and Romania warn that Russian drone and air violations require sustained U.S. military presence on NATO's eastern flank for effective deterrence.