The nuclear tipping point : prospects for a world of many nuclear weapons states / Mitchell B. Reiss -- Reconsidering a nuclear future : why countries might cross over to the other side / Kurt M. Campbell -- Will the abstainers reconsider? : focusing on individual cases / Robert J. Einhorn -- Egypt : frustrated but still on a non-nuclear course / Robert J. Einhorn -- Syria : can the myth be maintained without nukes? / Ellen Laipson -- Saudi Arabia : the calculations of uncertainty / Thomas W. Lippman -- Turkey : nuclear choices amongst dangerous neighbors / Leon Fuerth -- Germany : the model case, a historical imperative / Jenifer Mackby and Walter B. Slocombe -- Japan : thinking the unthinkable / Kurt M. Campbell and Tsuyoshi Sunohara -- South Korea : the tyranny of geography and the vexations of history / Jonathan D. Pollack and Mitchell B. Reiss -- Taiwan's Hsin Chu program : deterrence, abandonment, and honor / Derek J. Mitchell -- Avoiding the tipping point : concluding observations / Kurt M. Campbell and Robert J. Einhorn.