Iran nuclear talks hit new impasse

Talks between Iran and six world powers snagged over conflicting proposals about Tehran’s nuclear programme, a tug-of-war that pits international concerns about the Islamic republic’s potential to build atomic weapons against enforcing crippling sanctions on its people.

The day-long back-and-forth in Baghdad, Iraq, focused largely on whether the current enrichment level of Iran’s uranium production was a red line that the US and other powers would not permit for fear it could become warhead-grade material.