Iranian Nuclear Talks Stumble

A security guard at the nuclear enrichment facility in Natanz, Iran.

Negotiations between world powers and Iran over its nuclear program will spill over into a second week with the two sides still far apart.

The U.S. gave a bleak assessment of the latest round of negotiations in Vienna, saying Iranian officials weren’t serious about reviving a 2015 accord that limited Tehran’s atomic activities in return for sanctions relief.