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Proliferation Security Initiative

The Proliferation Security Initiative is a global effort to stop trafficking of weapons of mass destruction, their delivery systems and related materials to and from actors of proliferation concern. U.S. involvement stems from a national strategy which recognizes the need for more robust tools to stop proliferation and identifies interdiction as an area of greater focus.

Interdiction Principles

Take effective steps, whether alone or with other states, to interdict the transfer or transport of weapons of mass destruction, their delivery systems and related materials to and from actors of proliferation concern.

Adopt procedures for rapid information exchange concerning suspected proliferation activity, protecting the confidentiality of classified information provided as part of the initiative, dedicate appropriate resources and efforts to interdiction operations and capabilities, and maximize coordination among participants in interdiction efforts.

Strengthen relevant national legal authorities where necessary to accomplish objectives, and when necessary, relevant international law and frameworks in appropriate ways to support commitments.

Take specific actions in support of interdiction efforts regarding cargoes of weapons of mass destruction, their delivery systems, or related materials to the extent that national legal authorities permit, and consistent with obligations under international law and frameworks.

Participating Nations

Click on the Map Below to Enlarge
Map of Countires Supporting the Proliferation Security Initiative
  • Flag of AfghanistanAfghanistan
  • Flag of AlbaniaAlbania
  • Flag of AndorraAndorra
  • Flag of AngolaAngola
  • Flag of Antigua and BarbudaAntigua and Barbuda
  • Flag of ArgentinaArgentina
  • Flag of ArmeniaArmenia
  • Flag of AustraliaAustralia
  • Flag of AustriaAustria
  • Flag of AzerbaijanAzerbaijan
  • Flag of The BahamasBahamas, The
  • Flag of BahrainBahrain
  • Flag of BelarusBelarus
  • Flag of BelgiumBelgium
  • Flag of BelizeBelize
  • Flag of Bosnia and HerzegovinaBosnia and Herzegovina
  • Flag of Brunei DarussalamBrunei Darussalam
  • Flag of BulgariaBulgaria
  • Flag of CambodiaCambodia
  • Flag of CanadaCanada
  • Flag of ChileChile
  • Flag of ColombiaColombia
  • Flag of CroatiaCroatia
  • Flag of CyprusCyprus
  • Flag of Czech RepublicCzech Republic
  • Flag of DenmarkDenmark
  • Flag of DjiboutiDjibouti
  • Flag of DominicaDominica
  • Flag of Dominican RepublicDominican Republic
  • Flag of El SalvadorEl Salvador
  • Flag of EstoniaEstonia
  • Flag of FijiFiji
  • Flag of FinlandFinland
  • Flag of FranceFrance
  • Flag of GeorgiaGeorgia
  • Flag of GermanyGermany
  • Flag of GreeceGreece
  • Flag of Holy SeeHoly See
  • Flag of HondurasHonduras
  • Flag of HungaryHungary
  • Flag of IcelandIceland
  • Flag of IraqIraq
  • Flag of IrelandIreland
  • Flag of IsraelIsrael
  • Flag of ItalyItaly
  • Flag of JapanJapan
  • Flag of JordanJordan
  • Flag of KazakhstanKazakhstan
  • Flag of Republic of KoreaKorea, Republic of
  • Flag of KyrgyzstanKyrgyzstan
  • Flag of KuwaitKuwait
  • Flag of LatviaLatvia
  • Flag of LiberiaLiberia
  • Flag of LibyaLibya
  • Flag of LiechtensteinLiechtenstein
  • Flag of LithuaniaLithuania
  • Flag of LuxembourgLuxembourg
  • Flag of MacedoniaMacedonia
  • Flag of MalaysiaMalaysia
  • Flag of MaltaMalta
  • Flag of Marshall IslandsMarshall Islands
  • Flag of MoldovaMoldova
  • Flag of MongoliaMongolia
  • Flag of MontenegroMontenegro
  • Flag of MorrocoMorroco
  • Flag of The NetherlandsNetherlands, The
  • Flag of New ZealandNew Zealand
  • Flag of NorwayNorway
  • Flag of OmanOman
  • Flag of PanamaPanama
  • Flag of Papua New GuineaPapua New Guinea
  • Flag of ParaguayParaguay
  • Flag of PhilippinesPhilippines
  • Flag of PolandPoland
  • Flag of PortugalPortugal
  • Flag of QatarQatar
  • Flag of RomaniaRomania
  • Flag of RussiaRussia
  • Flag of SamoaSamoa
  • Flag of Saudi ArabiaSaudi Arabia
  • Flag of San MarinoSan Marino
  • Flag of SerbiaSerbia
  • Flag of SingaporeSingapore
  • Flag of SlovakiaSlovakia
  • Flag of SloveniaSlovenia
  • Flag of SpainSpain
  • Flag of Sri LankaSri Lanka
  • Flag of St. LuciaSt. Lucia
  • Flag of St. Vincent and the GrenadinesSt. Vincent and the Grenadines
  • Flag of SwedenSweden
  • Flag of SwitzerlandSwitzerland
  • Flag of TajikistanTajikistan
  • Flag of ThailandThailand
  • Flag of TunisiaTunisia
  • Flag of TurkeyTurkey
  • Flag of TurkmenistanTurkmenistan
  • Flag of UkraineUkraine
  • Flag of United Arab EmiratesUnited Arab Emirates
  • Flag of United KingdomUnited Kingdom
  • Flag of United StatesUnited States
  • Flag of UzbekistanUzbekistan
  • Flag of VanuatuVanuatu
  • Flag of VietnamVietnam
  • Flag of YemenYemen

Photos

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Objective

The Proliferation Security Initiative is a response to the growing challenge posed by the proliferation of weapons of mass destruction, their delivery systems and related materials worldwide. The PSI builds on efforts by the international community to prevent proliferation of such items, including existing treaties and regimes.

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