Iran nuclear talks progress, but is it enough to save the deal?

Announcing the first Iran nuclear deal in 2015, President Obama said it was built on verification, not trust. As governments examine the latest document agreed to by negotiators, the main obstacle to a renewed deal remains distrust.

American and Iranian nuclear negotiators are returning to their capitals with the final text of a document to restore the embattled 2015 Iran nuclear deal, after more than 15 months of European Union-brokered diplomacy in Vienna concluded with a final four-day round of talks.

The sudden resumption late last week of negotiations, which...