He works with the Departments of Defense and State on a range of strategic and Asian security issues. Among many global changes, the 21st century has ushered in the “Second Nuclear Age” with attendant nuclear proliferation and diversification of strategic systems. Bilateral, stable balances have given way to a more complex geometry of dynamic strategic interaction. Nowhere are these changes more pronounced than in China’s neighborhood, where Beijing sits at the fulcrum of several triangular security dilemmas in the strategic realm.