I'm honored to serve as Under Secretary for Arms Control & Int'l Security & grateful to @POTUS & @SecRubio for their confidence. Alongside the talented professionals of the bureaus and offices within my remit, I will faithfully execute @POTUS 's mission of achieving peace through strength. Stay tuned for updates on how we’re tackling the tough security challenges of the day.

Officials from the @StateDept Bureau of Emerging Threats were proud to attend and support the @WhiteHouse roundtable on fighting cybercrime. Cyberscammers beware: the gloves are off! The scams must end.

Thank you for a productive meeting, @JapanEmbDC Ambassador Yamada. I value the U.S.-Japan 🇺🇸🇯🇵 Alliance, which is built on our continued close coordination on issues including extended deterrence and arms control, and which grows stronger every day.

Last week’s U.S.-ASEAN Cyber Dialogue underscored how cybersecurity is key to national security. The United States and its @ASEAN partners are working together to safeguard citizens from cybercrimes and online scams. state.gov/releases/office-of…

The Bureau of Emerging Threats was proud to support @ONCD Director Sean Cairncross at last week’s U.S.-Singapore Cyber Dialogue. Together, we are committed to actively countering cybersecurity threats and holding malicious cyber actors accountable globally. state.gov/releases/office-of…

More than 12,100 gang members have been arrested, including more than 1,500 Tren de Aragua affiliates and nearly 2,000 MS-13 affiliates, along with more than 2,200 known or suspected terrorists (more than 2,000 of whom have been removed). whitehouse.gov/releases/2026…

As just announced in the @UN First Committee, Russia’s COSMOS 2612 military satellite has been exhibiting threatening behavior by intentionally maneuvering dangerously close to a commercial satellite, behaviors consistent with on-orbit weapons operations. This violates long-established safety thresholds in low Earth orbit. The United States will continue to secure and defend American vital national security interests in, from, and to space.

Companies from across #AUKUS are gathering in San Diego, California this month to test exciting new technology – from uncrewed boats and underwater drones to undersea communications. These tests exemplify the seamless collaboration of our trilateral defense innovation system. We will continue to supercharge each of our defense industrial bases and systematically break down barriers to cooperation. Incredible work! 🇺🇸🇬🇧🇦🇺

Great to speak to @NSSASpace this morning about the continued importance of collective space security. Exec. Order 14369 is clear about the critical need for the United States to lead the world in space exploration, and the opportunities for cooperation with industry to achieve that goal are immense.

A wide-ranging and substantive discussion with our #German counterparts in the @BMVg_Bundeswehr. Many thanks to State Secretary for Armaments and Innovation Jens Plötner and his colleagues for the collaborative dialogue about how the United States, Germany, and our respective industry partners can strengthen the transatlantic industrial base.

Countering hybrid threats at NATO and tackling the scourge of far-left terrorism are just two of the many items I was glad to discuss with our friends at the @BMI_Bund. The U.S.-German partnership is crucial to addressing these threats effectively. Thank you to the German MOI for their warm welcome and mobilization on these issues.

Following a productive touchpoint at #UNGA81, thank you to @GermanyDiplo for welcoming a U.S. delegation to #Berlin for deeper conversations. Key topics included reforming defense trade, biosecurity, and the U.S.-German cooperation on arms control and nonproliferation. Our work and collaboration continue! 🇺🇸🇩🇪

Why #Sweden? "Because we have a long history of defense integration that stretches back decades. Engines, avionics - we have extremely integrated supply chains. But it's also about bigger things, like very strong political and cultural ties." swedenherald.com/article/us-…

One dialogue, two allies, and three priority areas of mutual cooperation. This visit to #Sweden has demonstrated that U.S.-Sweden relations are thriving as we pursue expanded defense trade and other joint projects that strengthen both our economies and our collective national security. Thank you for being a valued ally of the United States!

Led a productive roundtable discussion with members of the Swedish Security & Defense Industry Association (SOFF) in #Sweden. There are numerous opportunities ahead of us for progress in meeting the pressing needs of both the U.S. and Swedish defense industries. Thank you for the constructive dialogue!

The President has made space a national priority, directing the Trump Administration to work with allies to strengthen contributions to space security. Sweden has been a great partner in working to achieve the vision laid out in the Technology Prosperity Deal’s (TPD) Pillar 5 objectives on space collaboration.