Science Weekly Was Iran really building a nuclear weapon?
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Mar 10, 2026 Kelsey Davenport, director of non-proliferation policy at the Arms Control Association, is an expert on nuclear weapons and proliferation. She discusses Iran’s civil nuclear work versus true weapons intent. She explains technical limits of 60% enriched uranium. She assesses damage from recent strikes and how conflict might shape future proliferation risks.
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Iran Moved From Civil Power To A Latent Weapons Option
- Iran pursued civil nuclear power under the Shah then shifted to a covert weapons-oriented program during the Iran–Iraq war.
- Kelsey Davenport says the organized weapons effort ran until about 2003, after which Iran preserved a latent option for leverage.
Technical Threshold Without Political Decision
- Iran reached a technical threshold with enriched uranium and centrifuge capability but lacked a clear political decision to weaponize.
- Davenport notes technical advances gave deterrent leverage rather than evidence of a structured weapons program.
60% Enriched Uranium Is Dangerous But Not Ideal
- 60% enriched uranium can be weaponized but requires conversion to metal and far more material, making bombs larger and less reliable.
- Davenport highlights the material is mostly gas now, so conversion and shaping would be necessary for a device.