EN
Even though Article 5 is NATO’s ultimate security guarantee, it is only the very last in a long chain of measures that need to be functioning in order to respond to today’s most probable and lethal threats. The Alliance has spent the last two years implementing the agreed Readiness Action Plan and reassuring eastern members not only with rhetoric, but also by taking more action and putting more troops on the eastern border. This is all what one would expect a political-military alliance to do when it is threatened. The evolution of NATO’s posture towards Russia has proven to NATO members, and, arguably, to their adversaries, that the Alliance still has a mission.