Table of Contents
Nuclear Timeline Remains Static at One Year
Prior to the June 2025 US-Israeli strikes, intelligence agencies estimated Iran could produce enough weapons-grade uranium for a bomb within three to six months . Following those initial strikes on the Natanz, Fordow, and Isfahan nuclear complexes, the timeline was pushed back to roughly nine months to a year.
However, after two additional months of strikes that began on February 28, 2026, the timeline has remained unchanged. The latest US and Israeli campaign largely targeted conventional military infrastructure, with Israel separately striking some nuclear-related facilities while US operations focused on weakening Iran’s broader military and defense capabilities .
The Highly Enriched Uranium Problem
Experts suggest that meaningfully delaying Iran’s nuclear progress would likely require eliminating or securing Tehran’s stockpile of highly enriched uranium (HEU) —a goal that has not been achieved.
The International Atomic Energy Agency (IAEA) estimates Iran possesses approximately 440 kilograms of uranium enriched to 60% purity. This material is significant because:
- It can be further enriched to 90% weapons-grade in as little as one week
- If further enriched, it would be sufficient for up to 10 nuclear weapons
The IAEA has been unable to verify the exact location of much of this stockpile since inspections were suspended. Reports indicate about half may be stored in an underground tunnel complex at the Isfahan Nuclear Research Center—locations that US munitions cannot penetrate .
Israeli Operations Targeting Nuclear Scientists
Meanwhile, Israeli operations have targeted Iranian nuclear scientists, which experts say could hinder Iran’s technical capabilities even if the core knowledge base remains intact. Prime Minister Benjamin Netanyahu confirmed in March 2026 that Israeli strikes had eliminated two more Iranian nuclear scientists, including individuals linked to the Organization of Defensive Innovation and Research (SPND) .
These assassinations add uncertainty to Tehran’s ability to build a functioning bomb, according to nuclear nonproliferation experts .
Tensions Remain High After Truce
Although the US and Iran agreed to a truce on April 7 to pursue peace, tensions remain elevated. Iran has disrupted traffic through the Strait of Hormuz, blocking an estimated 20% of world oil supplies and triggering a global energy crisis .
US officials continue to emphasize that preventing Iran from obtaining a nuclear weapon remains a central objective. Discussions around more aggressive options—including ground raids to retrieve HEU from deeply buried facilities—are reportedly underway .
Iran has consistently denied pursuing nuclear weapons, maintaining that its program is for peaceful purposes. However, US intelligence agencies and the IAEA note that while Tehran halted a warhead development effort in 2003, some experts believe key parts of the program may have been preserved .
