In an appearance on Fox News Sunday, Secretary of State John Kerry was challenged by Chris Wallace on his statement that the nuclear deal with Iran “ended their ability to get a weapon.”

Wallace asked Secretary of Energy Ernest Moniz why President Obama had failed to abide by his promise to not make a deal that didn’t end with Iran ending its nuclear ambitions given it can continue running centrifuges, doing research and enriching uranium.

 “What we have done is we have dramatically limited and constrained the program really through 15 years,” Moniz said.

“We have ended their ability to get a weapon,” Kerry said.

“For a limited time, sir,” Wallace replied.

“No!” Kerry said. “Not for a limited time. For the duration of the NPT.”