Iran, US harden positions as Tehran tightens grip on Strait of Hormuz

Iran and the United States appeared at an impasse Thursday, with each side hardening its position over talks and setting the stage for another potential escalation in the Middle East war. Thousands more US troops neared the region, while Tehran tightened its grip on the crucial Strait of Hormuz. Sirens over Israel warned of barrages of incoming Iranian missiles, and Gulf nations worked to intercept fire.