singapore's main counter-terrorism strategy includes cooperation with regional and international partners to achieve a transnational landscape of security. singapore is instrumental in the passage of international initiatives such as the landmark united nations security council resolution 1373 which established the legal basis for international action against terrorism. it is also at the forefront of the southeast asian counter-terrorism efforts and a united states partner in the proliferation security initiative (psi) that aims to combat the illicit trade and spread of weapons of mass destruction.