Research conducted by Perplexity AI using the following sources:

• Standoff with Iran over inspections cannot go on forever, IAEA chief says
• Iran Escalates Nuclear Standoff by Suspending Cooperation with IAEA
• The Deadlock Surrounding Iran's Nuclear Program
• IAEA Chief Urges Resolution in Iran Nuclear Standoff
• IAEA chief warns Iran nuclear standoff 'cannot go on forever'
• Explainer: What is the status of Iran's main nuclear facilities?