TEHRAN, Iran — Airstrikes hit two bridges and a train station in Iran on Tuesday, and Iranian officials urged young people to form human chains to protect power plants, as U.S. President Donald Trump warned that “a whole civilization will die tonight” if Tehran does not meet his latest deadline for the Islamic Republic to agree to a deal that includes reopening the crucial Strait of Hormuz. The U.S. also struck military targets on the Iranian oil hub of Kharg Island, according to a White House official who was not authorized to speak publicly and spoke on condition of anonymity. The attack marked the second time the island was targeted. Earlier in the war, American forces struck air defenses, a radar site, an airport and a hovercraft base there, according to satellite analysis by the Institute for the Study of War and the American Enterprise Institute’s Critical Threats Project. Trump has extended previous deadlines but suggested the one set for 8 p.m. in Washington was final, and the rhetoric on both sides reached a fever pitch, leaving Iranians on edge. Trump threatened to de
