FAS Strategic Security Blog

By Hans M. Kristensen

Can they do it? Expectations are high for the July Moscow Summit to produce an agreement to extent the START Treaty and commit to additional nuclear weapons reductions in the future. The following provides quick access to information about nuclear weapons numbers:

Overview of World Nuclear Forces

Global Nuclear Stockpiles, 1945-2006

US and Russian Total Nuclear Arsenals:

- United States

- Russia

- Briefing slides on history of US and Russian nuclear arsenals

US and Russian Non-Strategic Nuclear Weapons:

- US Nuclear weapons in Europe

- History of US nuclear weapons in South Korea

- Russian Tactical Nuclear Weapons

Other Nuclear Weapon States (Most Recent Overviews):

- France, China, United Kingdom, India, Pakistan, Israel, North Korea

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PACOM Commander Admiral Keating is “unaware” of the Japanese interest in the nuclear Tomahawk cruise missile reported by the Congressional Strategic Posture Commission.

By Hans M. Kristensen

Admiral Timothy J. Keating, who is Commander of U.S. Pacific Command, said Tuesday that he is “unaware of specific Japanese interests in the” nuclear-armed Tomahawk Land-Attack Missile.

That’s interesting because the Congressional Strategic Posture Commission recently pointed explicitly to such a Japanese interest in the role that the missile – known as the TLAM/N – provides in extending a U.S. nuclear umbrella over Japan to deter nuclear attacks against it from China and other potential adversaries in the region.

We would expect the commander of Pacific forces to be in close contact with the highest levels of the Japanese government and military.  Shouldn’t he be aware of a specific Japanese interest in specific weapons for the U.S. nuclear umbrella?  So statements to the contrary in the recent Congressional Commission report seem odd and worth investigating.

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North Korea mistakenly believes there are U.S. nuclear weapons in South Korea.

By Hans M. Kristensen

The North Korean newspaper Rodong Sinmun reportedly has issued a statement saying the U.S. has 1,000 nuclear weapons in South Korea. In this regional war of rhetoric it is important to at least get one fact right: The United States does not have nuclear weapons in South Korea. It used to – at some point close to 1,000 – but the last were withdrawn in 1991.

The only nuclear weapons the United States has in the Pacific today are the hundreds of warheads deployed on Trident II D5 sea-launched ballistic missiles on board eight Ohio-class nuclear-powered submarines patrolling in the Pacific Ocean. Some of them may be earmarked for potential use against targets in North Korea. Other weapons for bombers could be moved into the region if necessary, but they’re not today.

The North Korean obsession with the U.S. nuclear “threat” might be seen as confirmation that the nuclear deterrent works and hopefully will deter North Korea from attacking anyone. But the flip side of the coin is to what extent the U.S. nuclear posture in the Pacific – past and present – helps feed the North Korean nuclear rhetoric and perhaps even ambitions.

Additional information: A history of U.S. nuclear weapons deployment to and withdrawal from South Korea.

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The NASIC report dispels many web-rumors.

By Hans M. Kristensen

The Air Force Air and Space Intelligence Center (NASIC) has published an update to its Ballistic and Cruise Missile Threat. The document, which I obtained from NASIC, is sobering reading.

The latest update continues the previous user-friendly format and describes a number of important assessments and new developments in ballistic and cruise missiles of many of the world’s major military powers.

The report also helps dispel many web-rumors that have circulated about Chinese, Russian, Indian and Pakistani nuclear forces.

In this blog I’ll focus on the nuclear weapon states, particularly China.

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An article in USNI, which carries this photo of USS Hartford (SSN-768) damaged in a recent collision, discusses China’s ballistic missile submarines.

By Hans M. Kristensen

The magazine U.S. Naval Institute Proceedings has an interesting article about China’s nuclear ballistic missile submarines written by Andrew S. Erickson and Michael Chase from the U.S. Naval War College. And I’m not just saying that because they reference several of my publications about China, but because they provide an interesting discussion of the possible motivations for China’s emerging sea-based nuclear force.

I, for one, have always wondered why, if China’s current strategic modernization is intended to reduce the vulnerability of its long-range nuclear deterrent, would China want to cluster a significant portion of its missiles on a few submarines and send then out to sea where U.S. attack submarines can hunt them down?

In theory a sea-based nuclear deterrent is invulnerable because it can hide. But given that the U.S. Navy’s Maritime Strategy in the 1980s was explicitly designed to find and sink Soviet ballistic missile submarines before they could launch their missiles, how secure will China’s sea-based nuclear deterrent actually be? Or how would China react in a crisis, if one of the submarines went missing due to an accident?
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The North Korean nuclear test on May 25, 2009, was “heard” loud and clear around the world despite its apparent limited size. Detection of small, clandestine nuclear tests seems to work.

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By Hans M. Kristensen

The Korean Central News Agency reportedly has announced that North Korea “successfully conducted one more underground nuclear test on May 25 as part of measures to bolster its nuclear deterrent for self-defense.”  Several news media reported that the Russian Ministry of Defense estimating the test had a yield of approximately 10 to 20 kilotons.

Yet the preliminary seismic data published by the U.S. Geological Survey (USGS) shows that the test had a seismic magnitude of 4.7, only slightly more powerful than the 4.3 of the 2006 test.

Was it another fizzle? We’ll have to wait for more analysis of the seismic data, but so far the early news media reports about a “Hiroshima-size” nuclear explosion seem to be overblown.

Update: CTBTO’s initial findings.
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The Congressional Commission on the strategic posture report released yesterday is what the Air Force calls a “target rich environment.” There is a lot to shoot at. This essay follows up on the post that Hans Kristensen and I published yesterday. I want to continue the theme I discussed yesterday that the recommendations of the report are based on assumptions about nuclear weapons characteristics, assumptions that are implicit, unexamined, and unsupportable.
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The final report from the Congressional Strategic Posture Commission seems focused on hedging rather than leading.

By Ivan Oelrich and Hans M. Kristensen

The Congressional Strategic Posture Commission report published today is definitely not the place that the President or the nation should look for new ideas on how to reduce the role of nuclear weapons and lead the world toward a world free of nuclear weapons.

Even for a compromise document written by a diverse group, it is a work of deeply disappointing failure of imagination.  The recommendations can be summarized as:  the nuclear world should stay pretty much the way it is but at slightly lower force levels, incrementalism is the most we can hope for, and even that should be approached very cautiously.

The report comes close to dismissing the President’s vision of a world free of nuclear weapons – and the enthusiastic support it has generated worldwide – as a utopian dream:  “The conditions that might make the elimination of nuclear weapons possible are not present today and establishing such conditions would require a fundamental transformation of the world political order.”  The United States should retain a viable nuclear deterrence “indefinitely.”  The Commission surrenders to the nuclear problems of the world rather than recommending a proactive way forward out of the mess.

Of course, the Commission is not opposed to nuclear reductions per se and supports them under certain conditions, but it recommends that the approach “balances deterrence, arms control, and non-proliferation.  Singular emphasis on one or another element,” the report says, apparently hinting at disarmament, “would reduce the nuclear security of the United States and its allies.”

If the Commission’s report is any preview of the Pentagon’s Nuclear Posture Review, we should expect minimal changes in nuclear forces, structure, or mission.  The report recommends a nuclear policy of “leading and hedging” but seems to be focused on hedging.

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Vast inventories of nuclear weapons remain after the Cold War arms race ended.

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By Hans M. Kristensen

Russia’s nuclear forces are expected to drop well below 500 offensive strategic delivery vehicles within the next five years, less than one-third of what’s permitted by the 1991 START treaty. Unless the next U.S. Nuclear Posture Review significantly reduces the number of land-based intercontinental ballistic missiles, that single leg of the U.S. Triad of nuclear forces alone could soon include more delivery vehicles than the entire Russian strategic arsenal of land- and sea-based ballistic missiles and long-range bombers. With this in mind, Russia is MIRVing its ballistic missile to keep some level of parity with the United States.

This and more from a briefing I gave this morning at the Arms Control Association meeting Next Steps in U.S.-Russian Nuclear Arms Reductions.  I was in good company with Ambassador Linton Brooks, the former U.S. chief negotiator on the START treaty, who spoke about the key issues and challenges the START follow-on negotiators will face, and Greg Thielmann, formerly senior professional staffer of the Senate Select Committee on Intelligence, who discussed how the a new agreement might be verified through START-style verification tools.

Download: Briefing on US-Russian Nuclear Forces
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Pakistan’s nuclear weapons are “widely dispersed” says Secretary of State Hillary Clinton. Does that include the large weapons storage complex at Sargodha? Click for image.

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By Hans M. Kristensen

Secretary of State Hillary Clinton has expressed concern over the safety of Pakistan’s nuclear weapons in the light of increasing violence in the country. The weapons “are widely dispersed in the country – they are not at a central location,” she said in what is perhaps the first U.S. public indication of its knowledge about how Pakistan stores its nuclear weapons.

We’re pleased that both Washington Times and the Carnegie Endowment use our estimates for how many nuclear weapons Pakistan and other countries have. For additional information about Pakistan’s nuclear forces, see:

* Preparation of Shaheen-2 ballistic missile launchers.
* Nuclear Notebook: Pakistan’s Nuclear Forces, 2007 (most recent update).
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