We, the Heads of State and Government of the 30 NATO Allies, have gathered in Brussels to rea􀀀rm our unity, solidarity, and cohesion, and to open a new chapter in transatlantic relations, at a time when the security environment we face is increasingly complex.  NATO remains the foundation of our collective defence and the essential forum for security consultations and decisions among Allies.  NATO is a defensive Alliance and will continue to strive for peace, security, and stability in the whole of the Euro-Atlantic area.  We remain 􀀁rmly committed to NATO’s founding Washington Treaty, including that an attack against one Ally shall be considered an attack against us all, as enshrined in Article 5.  We will continue to pursue a 360-degree approach to protect and defend our indivisible security and to ful􀀁l NATO’s three core tasks of collective defence, crisis management, and cooperative security.