Research for my book on the future of NATO continues. Conversations with transatlantic leaders, especially Eastern and Central Europeans are very educational. It is almost as though there are two NATOs within NATO. One filled with members who want NATO primarily to protect them against a resurgent Russia. The second full of the founding (Western) members for whom NATO is “the world’s greatest alliance, pre-ordained as playing a role throughout the world.” How this gulf is bridged, whether it can be bridged is a key foreign policy dilemma for the Euro-Atlantic countries. Complicating the matter is defending NATO members against cyber-warfare. Article 5 of the NATO treaty (an attack on one member will be considered an attack on all) is now in play. What does it really mean going forward? Nobody is sure. Without certainty on this defiing NATO protection, what does the Alliance really guarantee? Stay tuned!