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ISIS Institute for Science and International Security

This satellite image from Planet Labs PBC shows rubble before a roof was built over it at Iran's Isfahan Nuclear Technology Center outside of Isfahan, Iran, on Dec. 7, 2025. (Planet Labs PBC via AP)
February 10, 2026, 12:44 pm
Satellite images show all entrances to Iran’s Isfahan nuclear site have been buried
US-based think tank says moves show Tehran ‘seriously concerned’ about US or Israeli attacks, says similar preparations were taken ahead of US strikes on nuclear sites last June
By ToI Staff
Portraits of Iranian military generals and nuclear scientists, killed in Israel's June 13 attack, are displayed above a road, as a plume of heavy smoke rises from an oil refinery in southern Tehran, after it was hit in an overnight Israeli strike, on June 15, 2025. (Atta Kenare/AFP)
August 28, 2025, 4:46 am
Iranian cleanup of nuclear site likely to erase proof of atomic work — report
Institute for Science and International Security says Tehran appears to be ‘sanitizing any incriminating nuclear weapons research’ at Mojdeh, which Israel bombed twice this June
By Agencies
In this March 30, 2005, file photo, an Iranian security official in protective clothing walks through part of the Uranium Conversion Facility just outside the city of Isfahan, Iran. (AP/Vahid Salemi)
June 9, 2025, 5:01 pm
IAEA finds Iran conducted key nuclear weapon production tests more than 2 decades ago
Security think tank analysis of recent nuclear watchdog report sheds light on decades of Tehran’s secretive activities, recommends bringing case to UN Security Council
By Shira Silkoff
Vehicles seen at a site in Sanjarian, near Tehran, previously identified as an Iranian nuclear research site, in a satellite image from October 15, 2020. (The Intel Lab/Maxar)
June 9, 2021, 9:01 am
Satellite images show activity at Iran site exposed in Mossad-seized nuke files
Facility that allegedly had been used to produce key nuclear component was covered up in recent months, after IAEA inspection of other suspected sites
By ToI Staff
President Hassan Rouhani, second left, speaks during a ceremony to unveil the Iran-made Bavar-373, a long-range surface-to-air missile system, displayed at rear, as his Defense Minister Gen. Amir Hatami, second right, commander of army's air defense force Gen. Alireza Sabahifard, left, and the chairman of the parliament's National Security and Foreign Policy Committee Mojtaba Zolnour, listen, at an undisclosed location in Iran, August 22, 2019. (Iranian Presidency Office via AP)
November 6, 2019, 2:04 pm
Iran shaves weeks off breakout time, but isn’t tearing up nuclear pact yet
Halting uranium enrichment at the heavily fortified Fordo was a major victory for the 2015 nuke deal; its reopening is seen as a dramatic bid by Tehran to leverage sanctions relief
By Judah Ari Gross
Illustrative: B61 nuclear bombs on a rack. (Courtesy US Department of Defense)
June 13, 2016, 4:21 pm
Nuclear powers shrinking, modernizing arsenals – watchdog
Despite fewer warheads, none of world’s 9 nuclear powers show signs of surrendering their atomic weapons, study finds
By AP and ToI Staff
The Nuclear Research Center NEGEV, located in Dimona. (screen capture: YouTube, via Channel 10)
November 21, 2015, 4:44 am
Israel has 115 nuclear weapons, says US think tank
New report alleges Israel produced some 660 kg of plutonium at Dimona nuclear facility over past 50 years
By ToI Staff
Satellite image of the Parchin facility, April 2012 (AP/Institute for Science and International Security)
August 12, 2015, 10:10 pm
Iran nuclear site vehicles likely not for cleanup, report says
Images show cars parked at site for five years, undermining claims Parchin is being illicitly sanitized
Iran's Foreign Minister Mohammad Javad Zarif delivers a speech during a press conference in Kuwait City on July 26, 2015. (Yasser al-Zayyat/AFP)
August 8, 2015, 7:25 pm
We’re doing road repairs near Parchin, claims Iran’s Zarif
US think tank says satellite images show activity that could be part of bid to hide nuke weaponization work before inspectors arrive
By ToI Staff and AP
Defense Minister Moshe Ya'alon visits the Israel Aerospace Industries center near Tel Aviv on July 26, 2015. (Ariel Hermoni/Defense Ministry)
August 7, 2015, 4:58 pm
Ya’alon: Israel ‘not responsible’ for Iran nuke scientists’ lives
Defense minister hints assassinations may resume, says Israel considering air strikes against nuclear facilities
By Adiv Sterman
Satellite image of the Parchin facility, April 2012 (AP/Institute for Science and International Security)
August 6, 2015, 10:01 pm
Iran says nuclear site cleanup claims ‘preposterous’
Tehran’s UN mission insists activity seen by satellites is road repair, blasts ‘extensive vicious campaign’ against nuke deal
By AFP
Satellite image of the Parchin facility, April 2012 (AP/Institute for Science and International Security)
August 6, 2015, 7:20 pm
Crates, trucks seen as Iran ‘clears up’ military site ahead of UN visit
Satellite images show activity that could be part of bid to hide weaponization work before IAEA arrives, says Washington think tank
By George Jahn
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