Documents -- Part 1. The evolution of the Alliance -- NATO's radical response to the nuclear revolution / Francis J. Gavin -- NATO and nuclear proliferation, 1949-1968 / Alexandre Debs and Nuno P. Monteiro -- The contest over NATO's future : the US, France, and the concept of pan-Europeanism after the fall of the Berlin Wall, 1989-1990 / Mary Elise Sarotte -- Part 2. Current challenges -- Toward an open and accountable NATO / Ian Davis -- The North Atlantic Treaty Organization : is NATO a force fit for a new century? / General Sir Graeme Lamb -- Organizational survival : NATO's pragmatic functionalism / Joana Spear -- NATO's charter : adaptable but limited / James Goldgeier -- NATO, regionalism, and the responsibility to protect / Anne Orford -- Conclusion : another Cold War? NATO and the new Russia / Adam Tooze and Ian Shapiro