Iran is using advanced models of centrifuges to enrich uranium, President Hasan Rouhani confirmed today. The move marks another breach of the 2015 nuclear agreement which lifted economic sanctions against Iran in exchange for strict limits on the country's nuclear program. In 2018, President Donald Trump withdrew from the agreement, formally known as the Joint Comprehensive Plan of Action (JCPOA) -- a move which Iran says nullified its own obligations. Trump has since reinstated sanctions on Iran. Iran has already taken steps that are in breach of the landmark deal. It started increasing uranium enrichment beyond the purity threshold it...