Iran Walks Away From Nuclear Talks, Threatens to Block Vital Oil Route

Iran stopped nuclear negotiations with the U.S. on June 1 and threatened to close the Strait of Hormuz—the narrow waterway through which a quarter of the world's oil passes. The breakdown follows months of failed talks over Iran's nuclear program and weapons. While the threat echoes past Iranian posturing used as leverage, Tehran also sent a new proposal through mediators, suggesting talks may not be entirely dead.