At its November 2006 summit in Riga, the Alliance made clear that countries that have met the political and military requirements for membership could expect to be invited to join the 26-nation pact during its 2008 summit.
Na samitu u Rigi u novembru 2006, Alijansa je jasno ukazala da zemlje koje ispune političke i vojne kriterijume za članstvo mogu očekivati da budu pozvane da se pridruže savezu 26 nacije na samitu 2008. godine.