So nuclear enrichment by Iran.
>Tulsi Gabbard, the director of US National Intelligence, said that the United States intelligence community had assessed that Iran was not rebuilding its nuclear enrichment capabilities following US and Israeli attacks last year.
>in written testimony to the Senate intelligence committee
https://www.aljazeera.com/news/2026/3/18/us-intel-chief-gabbard-says-iran-was-not-rebuilding-enrichment-prior-to-war

Tulsi Gabbard's opening statement can be found here (also see pdf related):
https://www.intelligence.senate.gov/2026/03/17/open-hearing-worldwide-threats-2/
https://www.intelligence.senate.gov/wp-content/uploads/2026/03/os-gabbard-031826.pdf
The actual quote:
As a result of Operation Midnight Hammer, Iran’s nuclear enrichment program was obliterated. There has been no efforts since then to try to rebuild their enrichment capability. The entrances to the underground facilities that were bombed have been buried and shuttered with cement. We continue to monitor for any early indicators on what position the current or any new leadership in Iran will take with regard to authorizing a nuclear weapons program.