CIA Director John Ratcliffe told skeptical U.S. lawmakers that American military strikes destroyed Iran's lone metal conversion facility and in the process delivered a monumental setback to Tehran’s nuclear program that would take years to overcome, a U.S. official said Sunday. The official, who spoke on the condition of anonymity to discuss the sensitive intelligence, said Ratcliffe laid out the importance of the strikes on the metal conversion facility during a classified hearing for U.S. lawmakers last week.