For decades, Iran has been subject to rigorous inspections of its core nuclear sites. Inspectors would visit its enrichment sites and check its stockpile of enriched uranium every couple of days, ensuring that Iran wasn’t diverting fissile material for a nuclear weapon.

As Iran suspends its cooperation with the International Atomic Energy Agency, its deputy foreign minister is speaking out about the damage to his country's nuclear program. NBC's Richard Engel report for TODAY from Tehran.

Iranian President Masoud Pezeshkian has approved a law to halt cooperation with the International Atomic Energy Agency (IAEA), a move which will likely obscure any attempt by Tehran to restart its damaged nuclear program.