Iranian President Hassan Rouhani announced Tuesday Iran would “resume uranium enrichment” at its Fordow plant and begin injecting uranium gas into 1,044 centrifuges, Iranian state media reports.

Why it matters: The announcement coincided with the first anniversary of the Trump administration’s “maximum pressure” campaign against Iran. Axios contributor Barak Ravid notes the announced plans are a substantial breach of Iran’s nuclear deal.

“In the nuclear deal Iran committed to stop enrichment at Fordow and turn the facility to a reaserach center,” Ravid said, noting it’s the first time Iran has undertaken enrichment at Fordow since the 2015 deal.