Space Force Retires Aging Warning Satellites

November 2026

The U.S. Space Force retired its final two satellites in a missile-warning constellation that operated for more than five decades as the service prepares to field its next-generation infrastructure amid quickening competition over space dominance.

Illustration of a Defense Support Program satellite on station. The U.S. Space Force recently retired its final two satellites in a DSP missile warning constellation as it moves to deploy new systems. (Photo courtesy of Northrop Grumman)

Ahead of decommissioning, the satellites participated in a U.S. Space Command exercise in early September before being moved into a graveyard orbit, the Space Force’s Combat Forces Command announced Oct. 1.

First launched into orbit in 1970, Defense Support Program (DSP) satellites used infrared sensors to detect missile launches and provide early warning of potential nuclear attacks during the Cold War. The constellation later supported detection of theater missile launches during the 1991 Gulf War and helped protect U.S. forces in subsequent conflicts.

“These last two satellites were the culminating end to over a half century of space-based early warning. The DSP constellation ensured deterrence during the Cold War and protected our deployed war-fighters from the Gulf War until their retirement last month,” said U.S. Space Force Col. Brandon Davenport, the Mission Delta 4 commander.

The military has since deployed the space-based infrared system constellation, which has provided improved missile-warning capabilities through more advanced infrared sensors since 2011. There are currently four of these sensors aboard satellites in highly elliptical orbit and six satellites in geosynchronous orbit. The Space Force is now developing Next-Generation Overhead Persistent Infrared satellites to replace the space-based infrared system and improve detection of smaller missile threats.

In August 2025, contractor Lockheed Martin announced that the first geosynchronous next-gen satellite had completed environmental testing, including thermal vacuum and acoustic tests. Recent anticipated launch dates for the satellites have passed, and new anticipated launch dates have been set for as late as 2029. In the fiscal year 2027 defense budget, the Space Force has proposed terminating the polar satellites in favor of lower-orbital satellites, leaving the future of missile-warning architecture uncertain.—JOCELYN BRIDGES

 

 

UN Urges U.S. to Address Marshall Islands Nuclear Legacy

November 2026

The UN Office of the High Commissioner for Human Rights (OHCHR) has called on the United States to address the legacy of 67 nuclear tests conducted in the Marshall Islands between 1946 and 1958.

Map of Marshall Islands locating the Enewetak and Bikini atolls, where 67 U.S. nuclear weapons were tested from 1946-1958.  (Graphic by Gal Roma / AFP via Getty Images)

A report published Oct. 1 concluded that “there has not yet been a comprehensive just settlement of [Marshallese] claims arising from the nuclear testing programme” and urged Washington to “permit the pursuit of further avenues of redress.”

Requested under UN Human Rights Council Resolution 57/26, the report used a “transitional justice” framework, which addresses systemic human rights abuses through truth-seeking, reparations, accountability, and guarantees of non-recurrence, rather than focusing solely on criminal prosecutions. It drew on consultations in the Marshall Islands and the United States and more than 60 submissions from governments, nongovernmental organizations, and environmental and human rights experts.

The report recommended that the United States declassify information about nuclear testing and engage in “good faith” dialogue with the Marshallese. It also urged Washington to provide healthcare, address environmental remediation needs, and ensure that Marshallese communities in the diaspora can access “culturally appropriate” benefits and services.

The Marshall Islands Nuclear Claims Tribunal assessed more than $2.3 billion in personal injury and property damage claims, but no claimant has received full compensation because of insufficient funds, according to the OHCHR deputy high commissioner, who spoke at a Human Rights Council session Oct. 1. During the dialogue, the Marshall Islands also called for greater transparency and accountability. OHCHR said the UN should consider acknowledging and apologizing for the role of the Trusteeship Council in allowing testing to continue.

Established in 1945, the council was a UN body responsible for monitoring the administration of territories and helping them achieve independence. It adopted resolutions in 1954 and 1956 that permitted nuclear testing to continue under certain conditions, despite appeals by the Marshallese to halt the tests altogether.

Under the 1986 Compact of Free Association, the United States and the Marshall Islands established the Section 177 settlement framework, which provided $150 million for a nuclear claims fund and an independent tribunal. The agreement also allowed the Marshall Islands to seek additional compensation under a “changed circumstances” provision. In 2000, the Marshall Islands petitioned for more than $3 billion in additional compensation, but the United States concluded in 2005 that the petition did not meet the provision’s criteria.

The two countries signed a renewed compact agreement in 2023. (See ACT, November 2023.) However, it did not resolve the nuclear legacy claims. Joseph Yun, then the U.S. special envoy responsible for negotiating the compact, said in 2023 that the new agreement did not affect those claims.—SHAGHAYEGH CHRIS ROSTAMPOUR

Webinar: The Erosion of Independent Health and Safety Oversight of the U.S. Nuclear Weapons Complex

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The webinar will be moderated by ACA executive director, Daryl G. Kimball, and ACA's chief operating officer, Kathy Crandall Robinson. Explore issues concerning the Defense Nuclear Facilities Safety Board (DNFSB) and US Dept of Energy.
 

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November 12, 11am-12:15pm EST

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The U.S. nuclear weapons production enterprise involves handling of nuclear and hazardous materials and waste that pose risks to plant workers, contractors, and the public. During the Cold War, the government shielded these activities from independent oversight in an effort to maximize weapons production. As a result, plant workers, nearby communities, and the surrounding environment suffered serious harm.

As the Cold War came to an end, pressure from concerned citizens and workers combined with dramatic revelations of unsafe and reckless operations throughout the Department of Energy's (DOE) nuclear weapons complex prompted state regulators and Congress to impose reforms that have strengthened health and safety protections and independent oversight, including the Defense Nuclear Facilities Safety Board (DNFSB), which was established in 1988.

Today, as the DOE and the National Nuclear Security Administration try to ramp up nuclear weapons production, they are reversing course. They have launched "Project Velocity," the purpose of which appears to be to weaken safety regulations and oversight of nuclear weapons production-related facilities.

In addition, the DOE is denying information and access requests from the DNFSB, and the White House has failed to nominate the requisite number of board members, jeopardizing the safety board's ability to carry out it duties.

To explore these issues, you are invited to take part in a special Arms Control Association virtual briefing featuring:

  • Joyce Connery owns and operates her own consulting firm, Connery Strategies, and is a distinguished fellow at the Nuclear Energy Policy Initiative of the Atlantic Council’s Global Energy Center. She retired in 2025 after over twenty-three years of U.S. Federal Government service including leadership at the Defense Nuclear Facilities Safety Board which she chaired from 2021-2025.
  • Don Hancock is the Director of the Nuclear Waste Program and Administrator of Southwest Research and Information Center (SRIC), where he has worked since 1975. Don focused on nuclear waste issues with special attention on the New Mexico Waste Isolation Pilot Plant (WIPP). He is also a leader in the Alliance for Nuclear Accountability network of more than thirty local, regional and national organizations formed by communities in the shadows of the U.S. nuclear weapons facilities and concerned about the consequences of the U.S. nuclear weapons and waste policies.
  • Miya Burke is the Program Manager for Hanford Challenge and works to hold accountable the safe, effective management and cleanup of the Hanford Nuclear Reservation. After decades of producing plutonium for
    the U.S. nuclear weapons, Hanford remains the most contaminated nuclear waste site in the Western Hemisphere. Miya is a member of the Oregon Hanford Cleanup Board and served as vice chair on the Hanford Advisory Board from 2023-2026.

The webinar will be moderated by ACA executive director, Daryl G. Kimball, and ACA's chief operating officer, Kathy Crandall Robinson, who has worked on nuclear weapons disarmament and weapons complex safety and health issues for several organizations including Physicians for Social Responsibility, Women's Action for New Directions, Union of Concerned Scientists, and Alliance for Nuclear Accountability.


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We hope that you'll join us on November 12. 

*This webinar is made possible with support from the Jubitz Family Foundation and the individual contributions of Arms Control Association members.

Statement on President Trump’s Comments About Denuclearization Talks with Russia and China

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Daryl Kimball, Executive Director, Arms Control Association, October 19, 2026
 

Last month, following his meeting with President Xi Jinping of China, President Donald Trump said he had “advocated for trilateral arms control negotiations between the United States, Russia, and China.” Last week, in an interview with Newsmax Trump claimed he is holding talks with Russia and China on “denuclearization.”

On Friday, the Chinese Ministry of Foreign Affairs said “It is neither fair, reasonable nor realistic to ask China to join the so-called trilateral nuclear disarmament negotiations at this stage.”

Today, in response to reports that Trump is open to a meeting proposed by Putin and Xi to discuss Russia’s war on Ukraine at the upcoming APEC summit, Trump said the talks were “not so much on Ukraine because Russia, frankly, has been fine on Ukraine, they haven’t been doing much, and the same with China…. We would have it to talk about weapons and denuclearization.”

Talks on ending Russia’s war on Ukraine must involve Ukraine. The United States should advocate and support an outcome that ends Russia’s attack and secures Russia’s withdrawal from Ukrainian territory.

At the same time, it is appropriate and necessary that the United States should discuss with China and Russia bilaterally or multilaterally meaningful restraints that can halt and reverse the costly, three-way arms race that each of the three states are pursuing. 

All five of the nuclear-armed states who are party to the nuclear Nonproliferation Treaty are legally obligated to engage in good faith negotiations to end the arms race and on nuclear disarmament, but there has been no progress on nuclear disarmament diplomacy for more than a decade.

In 2013, former President Barack Obama proposed talks with Russia on a further one-third reduction in U.S.-Russian strategic nuclear stockpiles but Putin rejected the offer. Since then, the United States and Russia have failed to negotiate a successor to the 2010 New Strategic Arms Reduction Treaty, which limited them no more than 1,550 deployed warheads each. In recent years, China increased the size of its smaller but still deadly arsenal to ensure it retains a survivable nuclear retaliatory force.

In his first term Trump proposed and failed to get “trilateral” arms control talks underway and refused to extend the 2010 New Strategic Arms Reduction Treaty, leaving it to Biden and Putin to do so in 2021. Late last year, as New START was due to expire again, Russia proposed, and Trump ignored, that the U.S. and Russia agree not to increase their strategic nuclear weapons deployments while they negotiate a new framework agreement. Now, there are no agreed limits on the arsenals of the world’s major nuclear-armed states.

If Trump is serious and wants to succeed on “denuclearization,” it will take more than statements and wishful thinking. He and his team will need to develop more realistic, balanced, and pragmatic proposals. To date, they have not done so. He and the other leaders must also recognize that one meeting on the margins of the APEC summit may, at best, just be the start of a process that leads to sustained, formal bilateral or multilateral negotiations.

As the Reagan-Gorbachev nuclear summit in Reykjavik forty years ago shows, progress requires serious preparation, plus bold and balanced win-win proposals that are verifiable and that advance the interests of all sides.

To jump-start serious disarmament diplomacy, all five NPT nuclear-armed states could agree to indefinitely freeze deployment of additional strategic launchers while the United States and Russia renew talks on further reductions of their massive strategic and non-strategic weapons stockpiles. As of now, Russia and the United States each have fewer than 800 total strategic launchers; China has an estimated 550; and France and the United Kingdom have a combined total of about 96.

A freeze at these levels would not affect any country’s ability to deter nuclear attack (and inflict catastrophic harm), could be confidently verified through national means of intelligence, would reduce tensions, and would create a better environment for bilateral or multilateral nuclear arms reduction talks.

If China is not prepared to engage in multilateral talks, Trump should pursue bilateral talks with Russia and continue to try to engage bilaterally with China. Earlier this month, Putin said the Kremlin is ready to resume a nuclear arms control dialogue with the White House.

Trump, Xi, and Putin could also reaffirm their commitments to the Comprehensive Test Ban Treaty and agree on new voluntary technical measures to ensure no state is conducting clandestine low-yield nuclear explosions. They could also begin negotiations on a binding declaration on maintaining effective human control over nuclear weapons and operational best practices to mitigate the risks of AI integration in nuclear and military systems.

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