Iran was poised Thursday to begin work on advanced centrifuges that will enrich uranium faster as the 2015 nuclear deal unravels further and a last-minute French proposal offering a $15-billion line of credit to compensate Iran for not being able to sell its crude oil abroad because of U.S. sanctions looked increasingly unlikely. Meanwhile, Iran released seven crew members from a detained British-flagged oil tanker Stena Impero in a goodwill gesture and the mariners flew out of Iran, the ship’s owner said.
