Our Publications

Articles and Reports
April 15, 2024
On Saturday, April 13, Iran launched a large, coordinated attack on Israel, reportedly firing more than 170 drones, 30 cruise missiles, and 120 ballistic missiles over the span of several hours.
Weapon Program Background Report
April 9, 2024
In recent years, Iran has developed and deployed centrifuge models that can enrich greater amounts of uranium with fewer machines relative to its original IR-1 design. This table sets out the number of installed and operational centrifuges at Iran's enrichment sites, as well as the capacity and primary materials of each centrifuge model.
Articles and Reports
April 9, 2024
How quickly could Iran get enough fissile material for a small nuclear arsenal? This timetable estimates how quickly Iran could amass enough weapons-grade uranium for five bombs. Once it has the enriched uranium, however, it could take at least several months to turn it into a working weapon.
Newsletters
March 29, 2024
This month’s newsletter features a new episode of Iran Watch Listen, a podcast by the Wisconsin Project on Nuclear Arms Control. We sat down with Wolf-Christian Paes, an expert on arms and maritime security, to discuss Iran’s support for the Houthi rebel group, the ways in which arms are smuggled into Yemen, and what can be done to stop the...
Interviews and Podcasts
March 27, 2024
In this episode, we sat down with Wolf-Christian Paes, who served on the U.N. Panel of Experts on Yemen from 2018 until 2023. We discussed Iran’s support for the Houthi rebel group, the ways in which arms are smuggled into Yemen, and the challenges of enforcing the arms embargo imposed on the Houthis by the U.N. Security Council.
Newsletters
February 28, 2024
This month’s newsletter features an analysis of two recent U.S. interdiction operations off the coast of Yemen. The operations, which turned up components of ballistic and anti-ship missiles and waterborne drones, present compelling evidence that Iran continues to violate the United Nations arms embargo on the Houthis.
Weapon Program Background Report
February 27, 2024
This page contains a catalog of Iranian ballistic missiles, cruise missiles, and space launch vehicles (SLVs), with each one linked to an image. It includes guided missiles with a potential range of 300 kilometers or greater that Iran has unveiled, even if they have only been displayed as mock-ups. 
Weapon Program Background Report
February 23, 2024
This timeline contains Iran's major missile accomplishments since 1984. Over the last year, Iran has unveiled the Fattah hypersonic missile; launched missile attacks against Iraq, Syria, and Pakistan; and placed several satellites into orbit using domestically designed rockets. Meanwhile, UN restrictions on Iran's ballistic missile program...
International Enforcement Actions
February 22, 2024
In January, U.S. forces conducted two operations to stop vessels smuggling lethal aid from Iran to Yemen. The interdictions took place against a backdrop of ongoing Houthi missile and drone attacks against ships in the Red Sea, highlighting the role Iran has played in enabling the Houthis' assault on global commerce.
Weapon Program Background Report
February 22, 2024
Iran has over 3,000 ballistic missiles, the largest arsenal in the Middle East. This table presents the known capabilities of Iran's major missile systems.

Pages