Why did Poland invoke NATO’s Article 4?

Poland has spent the past several years watching anxiously as its neighbor, Ukraine, fends off an invasion by Russia. But following an incursion into Polish airspace on Wednesday by what Prime Minister Donald Tusk described as a “huge number of Russian drones,” Warsaw has taken the rare step to invoke Article 4 of the NATO charter.

The measure calls for member nations to “consult together” and determine if the “territorial integrity, political independence or security of any of the parties is threatened.” If so, the group can then invoke NATO’s Article 5, which calls for a unified and potentially armed response.

What did the commentators say?

The drone incursion into Polish airspace has “thrust NATO ’s collective defense principles into the spotlight,” said Al Jazeera . While Poland