U.S. and Iranian negotiators have arrived in Switzerland for what could be the most critical round of talks yet, with the Strait of Hormuz dominating discussions as both sides seek a path forward amid lingering tensions. U.S. Vice President JD Vance joined a high-level American delegation in Burgenstock, while Pakistan's Prime Minister Shehbaz Sharif and Army Chief Asim Munir also participated in mediation efforts. Despite renewed diplomacy, Tehran has signaled that major differences remain, using its leverage over Hormuz and regional issues to press for additional concessions as negotiators race to prevent a fresh crisis.