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Under Secretary of State Thomas G. DiNanno
Department of State
127 posts
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Under Secretary of State Thomas G. DiNanno
Department of State
@UnderSecT
Official Account of the Under Secretary of @StateDept for Arms Control and Int'l Security (T).
Washington, DC
go.usa.gov/xFjUT
Joined October 2016
369
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  • Pinned
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    Under Secretary of State Thomas G. DiNanno
    Department of State
    @UnderSecT
    Dec 11, 2025
    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
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  • Under Secretary of State Thomas G. DiNanno reposted
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    US Dept of State INL
    Department of State
    @StateINL
    Jun 22
    Before the first whistle blows, INL-donated explosive-detection K9s are already making saves. Working with Mexican law enforcement at the 2026 FIFA World Cup, they’re helping stop explosive threats and keep thousands of athletes and fans safe on the world’s biggest stage.
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    Under Secretary of State Thomas G. DiNanno
    Department of State
    @UnderSecT
    Jun 16
    Yesterday, I spoke at the @pssi_prague. Some excerpts from my remarks: "Since the Trump Administration began its second term last year, the United States has unleashed American industry and ingenuity to advance an America First space policy - one that extends the reach of human
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    Under Secretary of State Thomas G. DiNanno
    Department of State
    @UnderSecT
    Jun 16
    "... In the face of mounting threats, some voices call for treaties prohibiting the placement of weapons in outer space. These voices - often from nations that do not share our values - decry what they call the growing risks of turning outer space into a springboard for
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    Under Secretary of State Thomas G. DiNanno
    Department of State
    @UnderSecT
    Jun 16
    "We will not be unilaterally constrained. We seek practical steps to reduce the risk of conflict in space. We seek transparency. We seek to avoid reckless behavior. We seek behavior-based approaches to stability: observable, confirmable, and conducive to the security of the
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  • Under Secretary of State Thomas G. DiNanno reposted
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    Czech Ministry of Foreign Affairs
    @CzechMFA
    Jun 15
    Replying to @CzechMFA
    The importance of the topic was underscored by US Under Secretary of State Thomas DiNanno, who opened the 9th Prague Space Security Conference, organized by @pssi_prague.
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  • Under Secretary of State Thomas G. DiNanno reposted
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    Czech Ministry of Foreign Affairs
    @CzechMFA
    Jun 15
    Some 200 distinguished guests from allied and partner countries gathered at Černín Palace @CzechMFA to address space-related threats and solutions.
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    Under Secretary of State Thomas G. DiNanno
    Department of State
    @UnderSecT
    Jun 15
    Productive meeting with @jiribr on the sidelines of the @pssi_prague conference. We discussed Czechia’s burgeoning defense trade with the United States, as well as U.S. arms export control policy, the benefits of the America First Arms Transfer Strategy, and dual-use controls.
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    Under Secretary of State Thomas G. DiNanno
    Department of State
    @UnderSecT
    Jun 15
    Excited to visit LOM Praha today, a maintenance facility owned and operated by @ObranaTweetuje. The company provides crucial comprehensive maintenance, repair, and overhaul services for the Czech Air Force and NATO. 🇺🇸 - 🇨🇿
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  • Under Secretary of State Thomas G. DiNanno reposted
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    Clash Report
    @clashreport
    Jun 12
    Senior U.S. official Thomas DiNanno in Poland: Poland has not waited for others to secure its future. By any measure, Poland is a model US ally. This is NATO 3.0 in action. The United States will be making another $4 billion available in our foreign military financing
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    Under Secretary of State Thomas G. DiNanno
    Department of State
    @UnderSecT
    Jun 12
    Honored to join @NawrockiKn & @KosiniakKamysz for the delivery of Poland’s first F-35 Husarz aircraft. Poland did not wait for others to provide for its defense — it invested boldly in its own military capabilities, and the USA remains proud to stand alongside it as an ally.
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    Under Secretary of State Thomas G. DiNanno
    Department of State
    @UnderSecT
    Jun 12
    Replying to @UnderSecT
    Yesterday I had productive meetings w/ @ZalewskiPawel & @CTomczyk. The US is committed to providing Poland & other NATO Allies w/ the very best defense technology to guarantee their fighting effectiveness in the decades to come and ensure the transatlantic relationship remains
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    Under Secretary of State Thomas G. DiNanno
    Department of State
    @UnderSecT
    Jun 12
    I was also pleased to meet with @WoWroch . Our partnership in the civilian nuclear sector is of great strategic importance and benefit to both our countries. Poland's leadership as part of a regional approach is helping to ensure future energy security in Europe. (4/4) 🇺🇸 - 🇵🇱
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  • user avatar
    Under Secretary of State Thomas G. DiNanno
    Department of State
    @UnderSecT
    Jun 12
    Replying to @UnderSecT
    Honored to join @NawrockiKn & @KosiniakKamysz for the delivery of Poland’s first F-35 Husarz aircraft. Poland did not wait for others to provide for its defense — it invested boldly in its own military capabilities, and the USA remains proud to stand alongside it as an ally.
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  • user avatar
    Under Secretary of State Thomas G. DiNanno
    Department of State
    @UnderSecT
    Jun 12
    Replying to @UnderSecT
    Honored to join @NawrockiKn & @KosiniakKamysz for the delivery of Poland’s first F-35 Husarz aircraft. Poland did not wait for others to provide for its defense — it invested boldly in its own military capabilities, and the USA remains proud to stand alongside it as an ally.
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  • Under Secretary of State Thomas G. DiNanno reposted
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    Ambassador Tom Rose
    Department of State
    @USAmbPoland
    Jun 12
    Today marks another historic chapter in the extraordinary history of the Polish Air Force. From the legendary Polish pilots who fought for freedom in the skies over Europe to the world-class airmen serving today, Poland has built a tradition of courage, excellence, and leadership
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  • Under Secretary of State Thomas G. DiNanno reposted
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    US Embassy Warsaw
    Department of State
    @USEmbassyWarsaw
    Jun 10
    Defense is a cornerstone of the U.S.-Poland partnership. @USAmbPoland Tom Rose hosted a roundtable with @AmChamPoland’s Defense & Security Committee to deepen cooperation between government and industry. The discussion highlighted the strength of U.S.-Poland defense ties and
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  • user avatar
    Under Secretary of State Thomas G. DiNanno
    Department of State
    @UnderSecT
    Jun 10
    Today, the United States sanctioned 13 individuals and entities in Iran, Belarus, and China, including Hong Kong, for supporting Iran’s weapons procurement, including efforts to acquire MANPADS. We will continue to maintain maximum pressure on Iran and disrupt networks that
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    Disrupting Iran’s Weapons Procurement - United States Department of State
    From state.gov
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