State ACN Bureau

I'm honored to serve as Assistant Secretary for Arms Control and Nonproliferation, and grateful to @POTUS and @SecRubio for their confidence. Alongside the talented professionals of the ACN bureau, we will execute @POTUS 's mission of making America safer, stronger, and more prosperous. Stay tuned for updates on our efforts!

We're ready for the next era of arms control—but we can't do it alone. Other countries have a responsibility to help ensure strategic stability. We call on every delegation in this room to join us in encouraging China and Russia to come to the table and take action without further delay. state.gov/wp-content/upl…

The US hosted an #NPTRevCon event in a demonstration of nuclear transparency and commitment to nonproliferation. The US is leading on strategic stability, risk reduction, and arms control, and on peaceful uses of nuclear energy - unleashing the Golden Era of US energy dominance.

SHAMEFUL. How does the NUCLEAR Non-Proliferation Treaty conference elect Iran as one of its 34 VPs, when the IAEA says Tehran has 400+ kg of 60% enriched uranium?? — accumulating a stockpile for which it has no credible, conceivable civilian justification?? This is exactly the kind of nonsense that makes Americans roll their eyes at multilateral institutions. Iran shouldn’t be given any cover for its dangerous behavior.

All #NPT States Parties should be concerned with Iran’s flagrant violation of the treaty. To defend the foundation of the nonproliferation regime, all NPT States Parties should use the RevCon to defend the treaty and the safeguards system. The time is now, and the need is urgent.

On April 28, @StateACN Assistant Secretary Dr. Christopher Yeaw delivered the U.S. national statement to the #NPT Review Conference. Now is the time to ensure the NPT regime is prepared to face the challenges of today and those of tomorrow. state.gov/wp-content/upl…

Ambassador Stufft opened the “Strengthening Cryptocurrency Compliance and Risk Management” workshop at the @AIFC_KZ , bringing together public, private, and banking sector leaders from Kazakhstan, Kyrgyzstan, and Uzbekistan. The workshop strengthens regional coordination among regulators and law enforcement to tackle sanctions risks in global crypto markets and promote strong compliance standards. The U.S. is proud to support a collaborative approach that safeguards innovation, protects financial integrity, and strengthens our C5+1 cooperation.

Today the U.S. is sanctioning several individuals, entities, and aircraft supporting Iran’s UAV and ballistic missile programs and terrorist activities. Under @POTUS’ national security directive, we’re exposing, disrupting, and countering Iran’s threats in order to protect American interests.

Great to be part of this productive exchange with Admiral Paparo. Our continued coordination with @INDOPACOM is essential to ensuring peace and prosperity across the Indo-Pacific.

Thrilled to announce the completion of the U.S.-El Salvador 123 Agreement negotiations with @Daalvarezc today. Along with @MilenaMayorga, committed to work together on necessary steps prior to signing and bringing agreement into force. This milestone strengthens 🇺🇸🇸🇻 bilateral partnership, advances energy security, and supports economic cooperation! @USEmbassySV #USElSalvador #EnergyDiplomacy

Pleasure to meet with Ambassador Viet🇻🇳 and discuss the upcoming NPT RevCon. We know the conference is in excellent hands. We will work to advance nonproliferation compliance, cooperation on the peaceful uses of nuclear energy, and call on all States to advance arms control and disarmament, risk reduction, and transparency.

The 🇺🇸& 🇦🇺, in partnership with 🇨🇦, @Mandiant, and @Dtex_ai, hosted industry leaders in Sydney this week to discuss combatting DPRK remote IT worker's’ deceptive tactics that fund WMDs and threaten the free market.  The DPRK continues to pose an evolving threat to U.S. and allied security, but, through partnership with the public and private sector, we are working to thwart these malign cyber activities.  Safeguarding the American people from all threats, including in cyberspace, remains our highest priority. au.usembassy.gov/media-note-the…

@StateACN teams supported by @usembassyguate visited Guatemala for @OPCW MPP reciprocal visit. @MinexGT convened various ministries and organized fruitful visits to @PuertoQuetzalGT & @INACIFgt. Guatemala remains committed to advancing its CWC implementation.

The United States, through @USEmbassyAddis and the State Department’s @StateACN Office of WMD Response and Planning, donated specialized equipment for countering–Weapons of Mass Destruction (WMD) terrorism training to the Ethiopian Federal Police University on March 18. This equipment builds on prior U.S. training to help detect and disrupt chemical, biological, and explosive threats. As we mark 250 years of American independence through the #Freedom250 initiative, we are deepening partnerships that help countries protect their people and strengthen global security. @StateINL

Pleased to meet with @iaeaorg Director General @rafaelmgrossi to reinforce the importance of strong U.S.-IAEA relations enabling the advancement of our shared objectives on nuclear safety, security, safeguards, and the peaceful uses of nuclear science and technology. Photo credit: Dean Calma/IAEA

@UnderSecT @State_IO

Chargé d'Affaires a.i. Robert Ewing welcomed to Manila @StateACN Principal Deputy Assistant Secretary Ann Ganzer, whose visit underscores 🇺🇸 commitment to 🇵🇭 energy security, including efforts to ensure nuclear power is safe, secure, and safeguarded. #PartnersInProsperity

Honored to host Assistant Secretary Yeaw of the @StateACN Department’s Bureau of Arms Control, Nonproliferation, and Disarmament, where we discussed how our mission delivers for the American people every day, from stopping the spread of nuclear weapons to strengthening space cooperation that supports U.S. security and prosperity.    @UnderSecT @State_IO

A firsthand look at the U.S. innovative technologies provided through @StateACN and @NNSANews support to IAEA safeguards. Game-changing instruments deployed in the field to assist @iaeaorg inspectors monitor and verify peaceful nuclear activities.

I’m grateful to Chargé Solomon and his excellent @usunvie team for their work across a wide range of vital U.S. interests from the peaceful use of outer space to nuclear nonproliferation.

@HudsonInstitute @UnderSecT Thanks to @RLHeinrichs and the team at @Hudson for a great event today.

In Geneva, @UnderSecT announced that the US detected Chinese yield-producing nuclear tests. At Hudson, Assistant Secretary Yeaw (@StateACN) gives more details about this June 22, 2020, supercritical detonation: