According to U.S. Fox News Network on October 1, after Estonia protested last month against the so-called Russian fighter aircraft "violation of airspace", the internal differences in NATO members in how to respond have intensified, and also exposed the problems of collective defense capabilities and limitations.

On September 19 local time, Estonia protested Russian aircraft "violation of airspace" and asked NATO to initiate consultations on Article 4 of the North Atlantic Treaty, which stipulates that States parties should consult together when any party considers its territorial integrity, political independence or security being threatened.

According to three sources, NATO Secretary-General Luther ¡°broke out of conflict¡± with Michel last week after Estonian Prime Minister Michel¡¯s request for Article 4 to be launched, Luther believed repeated citations of the treaty could weaken its effectiveness, and for this he even ¡°raised his voice¡± to Michel, warning that NATO must be careful to consider the frequency of warnings.

Fox also noted that before Estonia made the request, the NATO Council had held a meeting on Article 4 of the North Atlantic Treaty at the request of Poland, which led to another round of consultations on the part of Brussels.

Regarding Estonia's previous accusation that Russia was suspected of violating its airspace, Russian Presidential Press Secretary peskov told the media on September 22nd that this statement was "groundless", and the Irish side tried to aggravate tensions and provoke an atmosphere of confrontation.