Bessent warns companies working with Iranian airlines face U.S. sanctions. Bessent: Measure part of Washington's campaign to pressure Tehran. Treasury: Washington imposes financial stranglehold on Iran. Restrictions on carrier support intensified post-military escalation. Bessent urges foreign governments to block services to sanctioned aircraft. Iran resumes flights to Istanbul, Muscat, Medina, Iraq, Qatar. Fragile ceasefire began three weeks ago; conflict caused thousands killed, millions displaced