How can the United States and South Korea best co-operate to address new security challenges? Can the US-ROK alliance serve to advance South Korea's interests and at the same time help the US to more effectively pursue its own global and regional security objectives? In the context of these questions, the authors explore the possibilities for enhanced co-operation in both traditional and non-traditional spheres.

The chapters, all organised around a common set of questions, address issues ranging from counter-terrorism, military affairs, and nuclear non-proliferation, to the environment, pandemics, and biological threats, to peace building, development assistance, and humanitarian aid. In each chapter, the authors consider the capacities and potential for co-operation on both sides, assess the corresponding challenges, and propose new forms of collaboration.