The Comprehensive Nuclear-Test-Ban Treaty Organization. We work to end nuclear test explosions worldwide. Retweet ≠ endorsement

Vienna, Austria
Pinned Tweet
To mark 30 years since the #CTBT opened for signature, @DrRobFloyd sat down with @APLNofficial and @theELN. Before 1996, more than 2,000 nuclear test explosions. Since then, fewer than a dozen declared ones. The Executive Secretary explains why, and what it takes to keep it that way. 📖 Read the Q&A: ctbto.info/APLNIntv 🎧 Listen to the podcast: ctbto.info/ELNIntv
8
16
808
A promise this size needs proof it is being kept. The Road to Zero, our short 10-minute film marking 30 years of the #CTBT, opens the evening; a panel follows on what keeps that promise alive, featuring @DrRobFloyd, representatives from Argentina, Namibia, and @unodavienna. 🗓️ 1 October 📍 Top Kino, Vienna 🎫 Reserve: ctbto.info/RoadtoZeroEvent
2
4
213
Great to mark 30th anniversary of the CTBT with participants of @VCDNP Course on Nuclear Non-Proliferation and Disarmament and speak at a discussion along with colleagues. To a strong and sustained commitment to the #CTBT!
2
3
255
CTBTO retweeted
Grateful to @unodavienna for marking this anniversary with us. Ending nuclear test explosions belongs to the wider non-proliferation and disarmament effort, and our two offices carry that work forward side by side.
30 years ago today, countries began signing the CTBT: no more nuclear weapon test explosions. Anywhere. By anyone. Ever again. 🌍 📚 What does it take to make the global nuclear-test ban work? Explore the history & science behind it in our new course. 🎓 bit.ly/4h6Opgo
3
6
481
CTBTO retweeted
Thank you, Poland. 🇵🇱 has stood with this Treaty since day one, and it is good to see that support reaffirmed as we mark 30 years since the CTBT opened for signature.
We contributed to the negotiations of the Treaty more than 30 years ago in Geneva and attach importance to its entry into force. Poland continues to support the CTBT and its key goal - world free from nuclear tests. (2/2)
3
2
336
CTBTO retweeted
Thank you, Ukraine, for these words on the CTBT’s 30th anniversary. Your support for the Treaty is valued, and I look forward to what we do next together.
30 years since the #CTBT opened for signature, Ukraine reaffirms its firm commitment to the Treaty and its entry into force. We thank @DrRobFloyd and @CTBTO for their tireless efforts to advance its universalization — efforts that must be matched by the political will of States.
5
17
772
CTBTO retweeted
Thank you to the European Union for marking the CTBT’s 30th anniversary. Your support strengthens our Treaty, and I look forward to continuing our work together.
Statement by HR/VP @kajakallas on the 30th anniversary of the Comprehensive Nuclear-Test-Ban Treaty opening for signatures. The EU will remain resolute in its efforts to promote universal adherence to the CTBT and its entry into force. Nuclear testing must not return. Read the full statement here: link.europa.eu/QFqQdk
4
7
478
Another important step in preparing for the Integrated Field Exercise 2026: the equipment was shipped from #CTBTO's storage facility and arrived safely in Namibia this Friday morning. The exercise builds up readiness for the on-site inspection (OSI) regime under the CTBT, once the Treaty enters into force. The equipment will allow scientists and experts to test the tools, procedures and coordination needed to assess and validate the OSI capabilities. Follow us for updates on IFE26.
1
13
972
Wrapping up a busy #UNGA81 week, with the 12th Friends of the CTBT Ministerial Meeting as a highlight, @DrRobFloyd shares his reflections in the #CTBT's 30th anniversary year.
5
11
657
🔬 The She Shapes Science Fellowship held its second Bootcamp last week! Women scientists from across regions explored #CTBTO verification technologies — from seismic waves and hydroacoustics to infrasound and atmospheric trace gases — while strengthening their expertise in International Monitoring System (IMS) data and International Data Centre (IDC) data. 🎯 The goal: build national capacity, expand the use of #CTBT data, with women firmly at the center of technical fields that shape our world.
1
3
7
955
30 years since the #CTBT opened for signature, Ukraine reaffirms its firm commitment to the Treaty and its entry into force. We thank @DrRobFloyd and @CTBTO for their tireless efforts to advance its universalization — efforts that must be matched by the political will of States.
2
2
4
1,089
30 years ago today, countries began signing the CTBT: no more nuclear weapon test explosions. Anywhere. By anyone. Ever again. 🌍 📚 What does it take to make the global nuclear-test ban work? Explore the history & science behind it in our new course. 🎓 bit.ly/4h6Opgo
8
11
880
Poland 🇵🇱 joins the celebration day of 30th anniversary of the Comprehensive Test Ban Treaty(CTBT) as one of the most significant instrument of nuclear non-proliferation and arms control. (1/2)
1
2
178
Statement by HR/VP @kajakallas on the 30th anniversary of the Comprehensive Nuclear-Test-Ban Treaty opening for signatures. The EU will remain resolute in its efforts to promote universal adherence to the CTBT and its entry into force. Nuclear testing must not return. Read the full statement here: link.europa.eu/QFqQdk
8
14
38
4,975
As the #CTBT marks 30 years since opening for signature, Executive Secretary @DrRobFloyd speaks with @APLNofficial about the Treaty’s practical role, global impact, and its continued importance for nuclear non-proliferation and international peace and security.
As the Comprehensive Nuclear-Test-Ban Treaty (CTBT) turns 30, @DrRobFloyd, Executive Secretary of the @CTBTO, sits down with @APLNofficial to discuss the Treaty's practical role, global impact, and the future of nuclear non-proliferation. 🧵👇 Read the full exclusive interview here: apln.network/analysis/commen… #CTBT30
8
21
911
Thirty years after the #CTBT opened for signature, Executive Secretary @DrRobFloyd joins @theELN Deputy Executive Director Bekki Field to reflect on the Treaty’s achievements, its enduring role in advancing international peace and security, and the imperative of bringing it into force
On the 30th anniversary of the Comprehensive Nuclear-Test-Ban Treaty (#CTBT) opening for signature, @CTBTO Executive Secretary @DrRobFloyd joins @theELN Deputy Executive Director Bekki Field to discuss what the treaty has achieved over the past three decades, why it remains an important part of the global nuclear order despite not yet entering into force, and the challenges it faces today. Listen on Spotify: open.spotify.com/episode/1HQ… Listen on Apple Podcasts: podcasts.apple.com/gb/podcas…
1
7
11
874
CTBTO retweeted
Congratulations to Foreign Minister Tileuberdi on your recent appointment. We wish you very success.
At the @UN Headquarters in New York, FM Mukhtar Tileuberdi and @CTBTO Executive Secretary @DrRobFloyd visited the commemorative tree planted on the International Day against Nuclear Tests. The tree honors the victims of nuclear testing and serves as a reminder of its lasting humanitarian and environmental consequences, as Kazakhstan marks 35 years since the closure of the Semipalatinsk nuclear test site and the 30th anniversary of the #CTBT
3
9
621
On this day 30 years ago, the #CTBT opened for signature. The UK was one of the first to sign, and we remain strongly committed. In commemoration, @StewartWood met with @DrRobFloyd to see first hand the @CTBTO’s important contribution to international peace and security.
1
3
7
714
30 years ago, the Comprehensive Nuclear-Test-Ban Treaty #CTBT was opened for signature. On this significant day, as Latvia🇱🇻 chairs the @CTBTO Preparatory Commission in 2026, we reaffirm our strong support for the Treaty, its entry into force, and a world free of nuclear tests.
1
1
20
1,983
On 24 September 1996, the CTBT opened for signature: one of the most consequential steps ever taken against nuclear test explosions. 30 years on, 188 States have signed it and 179 have ratified it. The work of finishing it continues. 🌍 ctbto.info/Treaty
2
11
19
1,794