The new proposal is significantly more hawkish than Obama-era policy, as critics call US development of new weapons dangerous, Cold War thinking

The Trump administration plans to loosen constraints on the use of nuclear weapons and develop a new low-yield nuclear warhead for US Trident weapons, according to a former official who has find the most recent draft of a policy review.

Jon Wolfsthal, who was special aide to Barack Obama on arms control and nonproliferation, said the new nuclear posture examine prepared by the Pentagon, envisages a modified version of the Trident D5 submarine-launched weapons with only part of its normal warhead, with the intent of deterring Russia from using tactical warheads in a conflict in Eastern Europe.

The new nuclear policy is significantly more hawkish that the posture adopted by the Obama administration, which sought to reduce the role of nuclear weapons in US defence.

Arms control advocates have voiced alarm at the new proposal to make smaller, more “usable” nuclear weapon, arguing it makes a nuclear conflict more likely, especially in view of what they see as Donald Trump’s volatility and readiness to brandish the US arsenal in showdowns with the nation’s adversaries.

The NPR also expands the circumstances in which the US might use its nuclear arsenal, to include a response to a non-nuclear attack that caused mass casualties, or was aimed at critical infrastructure or nuclear command and control sites.

The nuclear posture review( NPR ), the first in eight years, is expected to be published after Donald Trump’s State of the Union speech at the end of January.

Wolfsthal, who has reviewed what he understands to be the final draft of its consideration of the report, said it states that the US will start work on reintroducing a sea-launched nuclear cruise missile, as a counter to a new ground-launched cruise missile the US has accused Russia of developing in violation of the 1987 Intermediate-Range Nuclear Forces( INF) pact.

Wolfsthal said that earlier drafts of the NPR was even more hawkish. The final draft plummets proposals to develop a nuclear hyper-glide weapon, and to remove assurances to non nuclear weapon is to say that the US will not use its nuclear arsenal against them.

” My read is this is a walk-back from how extreme it was early on. It doesn’t have as much dreadful stuff in it as it did originally ,” Wolfsthal said.” But it’s still bad .”

” What I’ve been told by the people who wrote the thing was what they were trying to do was to send a clear deterrent message to Russians, the North Korean and the Chinese. And there is pretty good, moderate but strong speech that makes clear that any attempt by Russia or North Korea to use atomic weapon would result in a massive outcome for them and I think that’s actually moderate, centrist and likely very much needed .”

” Where they go overboard, is where they say that in order to induce that credible the US needs to develop two new types of nuclear weapons ,” he added.

Wolfsthal said the modified Trident warhead, with merely the primary( fission) part of its thermonuclear warhead, was ” completely superfluous” as the US already has low-yield weapons, B61 gravity bombs and air-launched cruise missiles, in its arsenal.

He also said it was ” pretty dumb” to put a low-yield “tactical” weapon on the schemed new Columbia-class ballistic missile submarines, because firing it would give away a submarine’s position.

” We expend$ 5bn per submarine to make it invisible and we put a lot of warheads on each submarine and so what the hell is want to do is take one missile, put one small warhead on it and launch it first, so the submarine is vulnerable to Russian attack .” Wolfsthal said.” That strikes me as being unsustainable from a naval strategy point of view .”

The development of a low-yield warhead for a sea-launched ballistic missile is based on the sentiment that in any conflict with Russia on Nato’s eastern flank, the Russians would use a tactical atomic weapon early on, to compensate for their relative weakness in conventional arms. The Russians, the statement runs, would count on US reluctance to use the massive warheads on its existing weapons, contributing Washington to back down.

Hans Kristensen, the director of the nuclear datum programme at the Federation of American Scientists, said that justification for developing the new weapons was incoherent.

” It assumes that the intelligence community has determined that one or several antagonists out there are gambling that the US “wouldve been” self-deterred from use a ballistic missile warhead because they have larger yield. Thats merely absolutely no truth to the rumors. We have never, ever heard anyone say that is so ,” Kristensen said.

” I don’t think any adversary- certainly not Russia,- would gamble that if they did something with nukes that were low harvest that we would not react. That’s completely ludicrous ,” he added.” I think this is about having some warhead work at the laboratories and exploring options. I don’t see this as a real mission .”

Daryl Kimball, the head of the Arms Control Association, said that the development of new weapons in the US nuclear arsenal was ” dangerous, Cold War believing “.

” The United States already possesses a diverse array of nuclear abilities, and there is no evidence that more usable weapons will strengthen deterrence of antagonists or obligate them to make different options about their arsenals ,” Kimball wrote on the Arms Control Today website.

He also cautioned against moves to broaden the circumstances in which atomic weapon would be used.

” The employ of even a small number of these weapons would be catastrophic ,” Kimball said.” Threatening nuclear assault to counter new kinds of’ asymmetric’ menaces is unnecessary, would increase health risks of nuclear weapons use, and would make it easier for other countries to justify excess roles for atomic weapon in their policies .”

Read more: https :// www.theguardian.com/ us-news/ 2018/ jan/ 09/ us-to-loosen-nuclear-weapons-policy-and-develop-more-usable-warheads