 That's NPR's Elena Moore reporting from Delaware. Secretary of State Antony Blinken says the decision to withdraw the U.S. from the Iran nuclear deal was one of the biggest mistakes Washington has made in recent years. Blinken's remarks came during an address to the Aspen Security Forum. NPR's Peter Kenyon has more on that story. Blinken lamented the move by then-President Donald Trump to pull the United States out of the Iran nuclear agreement.