The Latest: Trump says Iran war could last weeks, US citizens in dozens of countries urged to leave

As the war in the Middle East spirals further, U.S. President Donald Trump said on Monday that the U.S. has “the capability to go far longer ” than its projected four-to-five-week time frame for its military operations against Iran.

The U.S. and Israel have continued to pound Iran since killing its Supreme Leader Ayatollah Ali Khamenei on Saturday, while Tehran and its allies have hit back against Israel, neighboring Gulf states, and targets critical to the world’s production of oil and natural gas.

The intensity of the attacks and the lack of any apparent exit plan set the stage for a prolonged conflict with far-reaching consequences. Israel and the U.S. have given conflicting answers about what exactly the war’s objectives are or what the endgame might be.

At least 555 people have been killed in Iran so far by the U.S.-Israeli campaign, the Iranian Red Crescent Society said, and more than 130 cities across the country have come under attack. In Israel, 11 people have been killed, with 31 in Lebanon, according to authorities.

The U.S. military announced Monday that two previously unaccounted for service member...