Greg Myrie

It will be very difficult for Trump to just walk away from the war if this hasn't been resolved.

We've had no information, and we've heard from the head of the UN's Atomic Energy Agency, who they saw that more than a year ago.

They don't know where that is, but not clear how the U.S.

plans to get that material, if Iran might make a deal on it.

So still, as much as he talked about the fact that Iran shouldn't get a nuclear weapon ever, he didn't say how the U.S.

would be able to guarantee it.

The Iranian missile slammed into the Prince Sultan Air Base, a military facility shared by Saudi and U.S.

forces outside the capital, Riyadh.

This comes from a U.S.

official speaking to NPR, who was not authorized to comment publicly.

The official said U.S.

service members were wounded and some aircraft were apparently damaged as well.

Iran has targeted U.S.

bases throughout the region since the war began a month ago.

Overall, the Pentagon has put the U.S.

casualty toll at 13 killed and more than 300 injured.

Greg Myrie, NPR News, Washington.

President Trump and the Pentagon have reported major progress in destroying Iran's missiles, but haven't released specific figures.

An American official, who's not authorized to speak publicly, told NPR that the U.S.

has only been able to confirm the elimination of around one-third of Iran's missile capabilities.