Eric Brewer Profile picture
Deputy VP @NTI_WMD. Previously NSC Director for Counterproliferation, Deputy National Intelligence Officer for WMD. Personal account/views my own.
Oct 2 10 tweets 2 min read
Concerns are mounting that events in the Middle East could lead Iran to build nuclear weapons.

Iran is not the first country to possess nuclear latency & potential weapons ambitions and find itself in a major crisis. What can we learn from history?

The news isn’t great…1/ In 1967, fearing an attack from its Arab neighbors (including an Egyptian attack on the reactor used to produce material for weapons), Israel likely took the final steps to assemble a nuclear device on the eve of the Six-Day War. 2/
Oct 19, 2023 12 tweets 2 min read
Some preliminary thoughts on the relationship between Iran’s nuclear program (the “nuclear crisis”) and the Israel-Hamas war and related dynamics (the “regional crisis”). 🧵

It would be too much of a stretch to say the current war is unfolding under the “nuclear shadow”…1/ That is, the presence of at least two nuclear-armed states and the risk of a conventional crisis going nuclear. But nor would it be accurate to say the nuclear dimension is irrelevant or absent from the crisis and the calculations of the various parties. 2/
Jun 8, 2023 5 tweets 1 min read
Lots of breathless reporting, denials, and tweeting about a possible deal where Iran stops enriching to 60%.

But it’s also worth asking what that stoppage, alone, would get us.

1/
It would:
- Prevent Iran from accumulating material that could be most quickly enriched to weapons grade
- Likely slow the rate Iran could build up its stockpile of material for “more bombs, faster” in a breakout scenario.

2/
Mar 10, 2023 8 tweets 2 min read
Both the NYT and WSJ now reporting that Saudi is seeking US assistance with its nuclear program and security guarantees in exchange for normalizing ties with Israel.

But there’s some important missing info and context on the nuclear issue.1/

nytimes.com/2023/03/09/us/… First, the US has been trying to help Saudi develop its nuclear energy program for a *long time.* It’s spent well over a decade trying to ink the deal (know as a “123 agreement”) that is legally required for the US to sell Saudi (and any country) nuclear technology. 2/
Feb 26, 2023 6 tweets 2 min read
What stands out to me here:

1) The comment that Iran hasn’t made a decision “to resume the weaponization program” it stopped in 2003 is consistent with what US officials have said to date, but more explicit (usually they say no evidence of decision to produce/weaponize). 1/ This is obviously good news and, quite frankly, one of the only things we have going for us at the moment. Most estimate that weaponization would take a year or two. Burns says “they're still a ways off.” 2/
Feb 25, 2023 5 tweets 2 min read
I’m not sure I’d say it’s likely at this point, but I also don’t think a “sheltered pursuit” strategy for Iran—where it uses Russian protection to advance further toward nuclear weapons and/or produce them—is out of the question. In the past that would have been laughable, but by all accounts the relationship is evolving in important ways. @HannaNotte has an excellent piece out on how Russian interests on the nuclear issue have shifted. library.fes.de/pdf-files/inte…
Jan 27, 2023 14 tweets 3 min read
I often get asked whether Iran will build nuclear weapons.

My answer is the same every time: I don’t know.

Here are a few data points that I think about when trying to answer that question. 🧵 1/

apnews.com/article/russia… First, if you allowed nuclear proliferation experts to create a hypothetical state that *should* build nuclear weapons, you’d be hard pressed to come up with a better example than Iran. 2/
Dec 4, 2022 8 tweets 2 min read
DNI Haines made several unsurprising, yet noteworthy comments on Iran at the Reagan National Defense Forum yesterday…. "We're not seeing the regime perceive this as an imminent threat to their stability”

“[protests are] not something we see right now as being an imminent threat to the regime"

"We don't have information that suggests that they've made a decision to move toward nuclear weapons"
Nov 22, 2022 5 tweets 2 min read
In response to the latest IAEA resolution, Iran begins enriching uranium to 60% at the deeply buried Fordow site, and announces plans to phase out old IR-1 centrifuges with more powerful IR-6 machines.

reuters.com/world/middle-e… Why this matters: 1) Until now, Iran was producing 60% only at its above ground (and therefore much more vulnerable) facility. Fordow is deeply buried and therefore harder to target in a military strike.
Nov 19, 2022 4 tweets 2 min read
Respectfully disagree. As I wrote earlier this week with colleagues, a proliferation “spiral” resulting from Ukraine is unlikely. And it’s Washington’s allies and partners—not Moscow’s—that pose the greater proliferation risk. foreignaffairs.com/ukraine/ukrain… The only Russian “ally” that poses a serious proliferation risk is Iran. But that is for reasons that have nothing to do with Russia.
Oct 20, 2022 7 tweets 2 min read
Explanations about *why* Iran decided to provide drones & training to Russia and what Tehran received in exchange have ranged from highly plausible ($, coordination on sanx evasion) to wildly absurd (nukes). But there are three potential motives I haven’t seen mentioned. 1/ First, Iran could very well see the use of its drones against Ukraine—backed by the U.S. and NATO—as a way to strike at the West in its own backyard. This would likely be viewed as an attractive opportunity after the U.S. spent almost the last two decades in Iran’s backyard. 2/
Aug 2, 2022 6 tweets 2 min read
That Iran would up the nuclear ante in response to U.S. sanctions (or at least blame sanctions for its latest nuclear advances) was predicted. A few things to keep in mind if this tit-for-tat exchange continues in the coming months. Bottom line: Buckle up for the long haul. 1/ As @hrome2 and I wrote last December, things "have changed significantly since the period from roughly 2010 to 2012, the last time Iran and the West were engaged in an escalatory cycle of sanctions and nuclear advances." 2/
warontherocks.com/2021/12/gettin…
May 8, 2022 6 tweets 1 min read
As many have noted today, the decision by Trump 4 years ago to leave the Iran nuclear deal was a massive strategic (and avoidable) error that lit the fuse for the current nuclear crisis. But the damage is actually much deeper. 1/ The JCPOA withdrawal and “maximum pressure” sanctions campaign highlighted two things to US adversaries: 1) US participation in an agreement may very well hinge on the next election, and 2) in the sanctions-relief-for-nuclear-limits bargain, the advantage goes to the US. 2/
Sep 25, 2021 4 tweets 2 min read
In defending against questions about why it is producing HEU, Iran cites the example of naval reactors and notes the recent AUKUS nuclear-powered sub arrangement to point to double standards. So are the nonpro risks of that deal already manifesting? Not really…1 Iran has long cited potential interest in nuclear propulsion as a reason it might want to enrich to 90%. It also began enriching to HEU (60%) long before the AUKUS announcement. 2/
Aug 27, 2021 9 tweets 2 min read
As a former Deputy NIO and someone who has written similar documents, I have to comment on the ODNI's COVID-19 assessment. Bottom line: I'm sure it will disappoint many, but it is not "inconclusive," and it does many of the things these types of assessments should do. 1/ It doesn't definitely settle the debate over COVID's origins, but it does have other useful judgments: COVID wasn't a bio weapon, it probably was not genetically engineered, and China didn't have foreknowledge of the virus. 2/
Sep 8, 2020 10 tweets 3 min read
ICYMI: Last week, @csisponi and @CNASdc released our new report that looks at how geopolitical trends will shape the future nuclear landscape and the U.S. ability to manage it.

A thread: 1/

csis.org/analysis/towar… First, why did we write this report? For starters, there's been a lot of focus recently on how technological developments are impacting deterrence, stability, and proliferation, but less on where geopolitics fit in. 2/
Aug 22, 2019 8 tweets 2 min read
An initial thread on the Iran section of the new State Dept. compliance report. I'll leave it to the lawyers to opine on whether the report was used as designed, but there's a lot of substance worth mentioning. A few key insights... 1/ 1. The report reaffirms that the 2007 NIE got it right, and that "Iran is not currently undertaking the key nuclear weapons development activities judged necessary to produce a nuclear device." (The same judgment included in the DNI's ATA in January).
Jan 31, 2019 9 tweets 2 min read
There's a lot of bad info floating around out there about how the IC works and how it does the Worldwide Threat Assessment. So as someone who has helped draft these documents (including on issues like Iran!), let me try and set a few things straight in this thread: 1/ None of the judgements in the ATA are new or surprising (or at least they shouldn't be) to those who regularly receive intelligence. The IC doesn't break new news in the ATA. That means that Trump and others have known about these assessments on NK and Iran for some time. 2/