The Proliferation Security Initiative (Psi)

The Proliferation Security Initiative (Psi) in 2016

Launched in 2003, the PSI has increased international awareness and capability to address the challenges associated with stopping the trafficking of weapons of mass destruction (WMD), WMD-related components, and their means of delivery. The PSI remains an important tool in the global effort to combat CBRN material transfers to both state and non-state actors of proliferation concern. Since its launch, 105 states have endorsed the PSI Statement of Interdiction Principles, by which states commit to take specific actions, consistent with their respective national legal authorities and relevant international law and frameworks, to support efforts to prevent the trafficking of WMD, related materials and their delivery systems. In 2016, there were 13 bilateral and multilateral activities designed to promote and exercise the Critical Capabilities and Practices to help ensure WMD do not fall into the hands of state and non-state actors of proliferation concern.