Kerry is defending the deal during a forum in Washington. He says kings and foreign presidents told the US that bombing was the only language Iran would understand. But Kerry says that was "a trap" in many ways because the same countries would have publicly criticised the US if it bombed.
Kerry says Israeli Prime Minister Benjamin Netanyahu was "genuinely agitating toward action."
Kerry says he doesn't know whether Iran will resume pursuing a nuclear weapon in 10 to 15 years after restrictions in the deal sunset. But he says it was the best deal the US could get.