He will visit ahead of an August 25 deadline for Iran to provide information relevant to the International Atomic Energy Agency’s investigation into the Iranian regime’s research on how to build a nuclear bomb.

Diplomatic sources told Reuters two weeks ago that the IAEA was concerned about the Iranian regime’s failure to make good on pledges of more transparency.

The Iranian regime’s Foreign Minister, Mohammad Javad Zarif, said on Wednesday that it is unlikely for the clerical regime and the P5+1 countries to reach a final nuclear deal before the expiration of the four-month extension of talks.

Zarif said that even if the Iranian regime and the P5 +1 managed to strike a general agreement before the deadline, they would still need more time to negotiate the details of the deal, according to IRNA.