We are responding to this challenge with an activist agenda that includes a broad range of tools – norms, export controls, interdiction, sanctions, counterproliferation, deterrence, and direct diplomacy. Our toolkit also includes the multilateral nonproliferation arrangements or regimes – the Missile Technology Control Regime (MTCR), the Australia Group (AG) Chemical/Biological regime, the Nuclear Suppliers Group (NSG), the Zangger Committee, and the Wassenaar Arrangement (WA) Conventional Arms and Dual-Use Goods and Technologies regime. Members of these regimes agree as a matter of policy to establish laws, policies, and/or regulations consistent with the regimes’ guidelines. The guidelines of the regimes are not internationally legally-binding arrangements. The other key multilateral approaches are treaties or conventions that establish basic norms related to chemical, biological, and nuclear weapons. These multilateral mechanisms are legally-binding on members and are global in scope. They are the Chemical Weapons Convention (CWC), the Biological Weapons Convention (BWC) the Nuclear Nonproliferation Treaty (NPT), and the International Atomic Energy Agency (IAEA).