NPR's Leila Fadel speaks with Vali Nasr, professor of Middle East studies at Johns Hopkins University, about his reaction to U.S. strikes in Iran and the effects this could have on the region. We ...

Three minutes after 4 a.m. Tehran time, he announced that Iran was ceasing its operations. Despite this, Iran fired six salvos totaling 12 missiles before the ceasefire deadline.

There have been different analyses of the "breakout" timeline -- the time at which Iran's program could progress to the point at which it could achieve nuclear weapons capability.

Do the U.S. and Israel know where Iran would have stockpiled its highly enriched uranium at this point? Well, there were assumptions that the stockpile was in tunnels at a site outside of Isfahan.

And we've been threatened by Iran for many years," Trump said. "You know, if you go back and look at my history, if you go back 15 years, I was saying we cannot let Iran get a nuclear weapon.

Nuclear experts believe Iran relocated more than 400 kg of highly enriched uranium—enough for 10 nuclear weapons—to a secret location. Here's what that would look like.