VIENNA—Iran and global powers resumed talks on April 15 to rescue the 2015 nuclear deal in an effort potentially complicated by Tehran’s decision to ramp up uranium enrichment and what it called Israeli sabotage at a nuclear site.
Casting a shadow over the Vienna talks, Tehran on April 13 announced its decision to enrich uranium at 60 percent purity, a step closer to the 90 percent that is weapons-grade material, in response to an explosion at its key Natanz facility on April 11.
