The authors of this volume analyze developments in 2009 in international and regional security, non-proliferation, arms control and disarmament. The themes discussed include a number of priority issues. Among them: lessons from the 1991 START and the prospects for further deep reductions of strategic nuclear weapons, parallel security issues that are likely to affect strategic stability and nuclear disarmament negotiations; the potential deployment of weapons in outer space, particularities of arms control in this environment and prospects for limiting and prohibiting space weapons; compliance and enforcement processes in the context of the NPT regime and the ways to streng¬then them. Several chapters deal with regional security problems. They include: the long-needed reform of European security and Russia’s initiative to move toward a new Euro-Atlantic security architecture; the conflict in Afghanistan and the ways to resolve it; the risks posed by nuclear Pakistan.