Estonia has accused Russia of carrying out an 'unprecedentedly brazen' violation of its sovereignty after three Russian MiG-31 fighter jets entered its airspace for nearly 12 minutes on Friday morning.
The incursion near Vaindloo Island in the Gulf of Finland is the longest in recent memory and prompted Tallinn to invoke Article 4 of NATO's founding treaty, a step taken only in moments of serious security concern, according to BBC News.
