President Donald Trump said in an interview with Fox News host Mark Levin on Tuesday that at the time of the U.S. strikes on Iran’s nuclear facilities in June, he believed Tehran “would have had nuclear weapons in a period of four weeks.”

Calling in to Levin’s radio show, Trump said that, “if we didn’t [strike Iran], they would probably by this time, just about this time, have a nuclear weapon and they would have used it.”

Trump said that, despite news reports questioning his assessment of the efficacy of the strikes, “it turned out that” the impacts were “even more so than I said. It was obliteration.”

“The Atomic Energy Commission said, this place is gone. [Iran] can maybe start up, but they’re not starting up there,” Trump said of the Iranian nuclear facilities targeted in the operation. The Israel Atomic Energy Commission found that the U.S. strike on the Fordow nuclear facility “destroyed the site’s critical infrastructure” and rendered it “inoperable,” though reports differ on the extent of the damage. 

The president told Levin that the U.S. Air Force pilots who conducted the strikes told him that they and their predecessors had been practicing the flight to Iranian airspace for 22 years.

Trump lauded his peacemaking abilities, saying, “I’ve settled six wars and we did the Iran night, wiped out their whole nuclear capability, which they would have used against Israel in two seconds if they had the chance.”

He called Israeli Prime Minister Benjamin Netanyahu a “war hero” and said, “I guess I am, too. … I mean, I sent those planes.”