Chairman of the Joint Chiefs of Staff holds briefing on U.S. military operations in Middle East

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ARLINGTON, Virginia (CNN) -- The Chairman of the Joint Chiefs of Staff Gen. Dan Caine said the US war against Iran would not consist of a “single, overnight operation” and added that more US casualties should be expected.
“This is not a single, overnight operation,” Caine said at the Pentagon on Monday. “The military objectives that CENTCOM and the Joint Force have been tasked with will take some time to achieve, and in some cases, will be difficult and gritty work.”
“We expect to take additional losses, and as always, we will work to minimize US losses,” the general added.
Four American servicemembers have been killed since the US and Israel struck targets inside Iran over the weekend.
Here's the latest
• Pentagon briefing: US Defense Secretary Pete Hegseth said the goal of the strikes on Iran was not regime change, “but the regime sure did change and the world is better off for it.” Joint Chiefs of Staff Chairman Gen. Dan Caine said the war against Iran would not be a “single, overnight operation.”
• Expanding war with Iran: Iran’s top official said Tehran “will not negotiate” with the US. Israel and Hezbollah are trading blows as the conflict widens, while explosions have been heard in Gulf cities including Dubai, Abu Dhabi and Doha. Here’s a look at the war in maps and charts.
• Fighter jets shot down: Three US fighter jets were accidentally shot down by Kuwaiti air defenses in an apparent “friendly fire incident,” according to the US military. All crews have been recovered and are in stable condition.
• Death toll grows: At least 555 people have died in Iran since the US-Israeli strikes began, according to the Red Crescent Society. President Donald Trump acknowledged there could be more US casualties after four US troops were killed in Kuwait.
• Global shockwaves: Qatar’s state-run energy company has stopped its production of liquified natural gas, following an Iranian attack on its facility. Qatar accounts for roughly 20% of global exports. The war has also disrupted air travel, with airspace closed in the Middle East.