The ultimate success of the U.S. and Israeli strikes, and so Trump's decision to intervene militarily, depends on how Iran chooses to react. Some analysts fear this action will accelerate Iranian efforts to build a nuclear weapon, with hardliners in Tehran now viewing it as an urgent priority.

The move intensifies a standoff over Iran’s nuclear work following Tehran’s decision to suspend cooperation with the agency.

The withdrawal of international inspectors comes amid heightened concerns that Iran, battered by Israeli and U.S. strikes, may be driven to try to build a nuclear bomb.