With its known capacity, Iran cannot make a sudden dash to produce the fuel for a small nuclear arsenal of five implosion-type warheads – the goal Iran set for itself when it began to work on nuclear weapons decades ago. Instead, the main nuclear weapon risk in Iran is secret sites, which Iran has relied on to carry out illicit work in the past.
The new U.S. administration is seeking to reenter the Joint Comprehensive Plan of Action (JCPOA), the nuclear agreement reached in 2015 with Iran and six other parties. This effort has been complicated by the previous administration's "maximum pressure" policy, which sought to squeeze Iran with sanctions.
International Enforcement Actions
On May 8, the U.S. Navy released a statement describing the seizure of “an illicit shipment of weapons” in the northern Arabian Sea that had taken place over the previous two days.
On May 8, 2018, President Donald J. Trump announced the U.S. withdrawal from the nuclear agreement. Effective immediately, U.S. nuclear sanctions on Iran were reinstated and the President warned that "any nation that helps Iran in its quest for nuclear weapons could also be strongly sanctioned by the United States."