External Activities

The latest external activities of Open Nuclear Network staff

Andreas Persbo Speaks at Cape Town Workshop on Nuclear Disarmament Verification

ONN Director Andreas Persbo examines nuclear disarmament verification, emphasising its importance for treaty implementation, the breadth of the verification process and the challenge of integrating credible and practical systems.

April 22,2026

Olamide Samuel for AlJazeera News: The war on Iran is eroding nuclear non-proliferation

In a new Al Jazeera op-ed, Olamide Samuel argues that the war on Iran is weakening nuclear non-proliferation by undermining the institutions, safeguards, and diplomatic rules that make the NPT credible.

April 27,2026

Understanding the KN-25: Tianran Xu on North Korea’s Expanding Nuclear-Capable Missile Arsenal

In a recent article for NK Pro, ONN Senior Analyst Tianran Xu examined North Korea’s 600 mm calibre multiple rocket launcher system (KN-25), highlighting its growing role in the Korean People’s Army’s conventional and nuclear strike capabilities. The analysis sheds light on the evolution of North Korea’s missile forces and the operational concepts underpinning Pyongyang’s regional deterrence strategy - issues that are central to ONN’s mission of improving understanding of nuclear risks and security dynamics in Northeast Asia.

May 15,2026

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March 07, 2019

North Korea must give up all nuclear weapons before any sanctions relief, says US

“The fact that both facilities are active at the same time suggests that there are preparations for a new launch, but it is impossible to tell what they are going to launch,” said Melissa Hanham, a North Korea expert at the One Earth Future foundation.

March 01, 2019

Activity At 2nd North Korean Missile Site Indicates Possible Launch Preparations

“According to Planet imagery, I can definitely say the train has left the station,” says Melissa Hanham, a North Korea expert with the One Earth Future Foundation. “But I can't unfortunately use X-ray vision to see what's on the train and tell whether it's a civilian space launch vehicle or a milita...

February 28, 2019

How to Tell If Trump's Second Summit With Kim Jong Un Is a Success

"I'm definitely interested in constructive action that limits or stops the amount of fissile material that North Korea can produce,"said Melissa Hanham, a director at the One Earth Future Foundation. "But this will just be a piece of paper unless it’s implemented, and I don’t think a handshake will ...

February 27, 2019

The Daunting Challenge of Shutting Down North Korea's Nuclear Complex

Melissa Hanham speaks to TIME about the Daunting Challenge of Shutting Down North Korea's Nuclear Complex

February 21, 2019

"Trump-Kim Summit: From Yongbyon Site to Sanctions, What Each Side May Bring to the Table" by Simon Denyer for The Washington Post

Melissa Hanham shared her insights on the difficulties to engage the DPRK in inspection and negotiation on its nuclear reactor sites.

January 28, 2019

US nuclear weapons: first low-yield warheads roll off the production line

Melissa Hanham of the One Earth Future foundation pointed out that adversaries would have no way of knowing if a full-force Trident was being fired at them, or its low-yield cousin.

January 28, 2019

"United States Begins Working on New Nuclear Weapon to Counter Russia" by Brendan Cole for Newsweek

Melissa Hanham shard her insights on the issue to estimate the power of nuclear weapons.

January 17, 2019

Trump announces huge expansion of US missile defense system

Melissa Hanham, an expert on weapons of mass destruction at the One Earth Future foundation, said that any idea that missile defence could limit the damage of a nuclear war was “fantasy”. “If we invest as much money in lowering tensions and de-alerting missile systems, we would be safer by far,” Han...

January 15, 2019

N Korea’s nuclear programme quietly advances

“There is no indication that their nuclear and missile programmes have slowed or paused,” said Melissa Hanham, the director of the One Earth Future Foundation's Datayo Project and an expert in using satellite imagery and other publicly available data to analyse weapons proliferation. “Rather it has ...