Opinion: U.S.-Iran talks need sincerity, not brinkmanship

Recent tensions in the Strait of Hormuz have dashed the already fragile hopes for de-escalation between Washington and Tehran. Renewed brinkmanship is shrinking the narrow space for diplomacy while amplifying risks that extend far beyond the two countries involved. As a conduit for roughly one-fifth of the world's oil supply, the strait serves as a shared maritime lifeline -- not a stage for geopolitical games.