NEW: More than 50,000 U.S. service members are now operating across the Middle East as President Trump gives a dire warning to Iran.
President Trump says the U.S. will destroy "one bridge or power plant" for every time Iran fires on a ship in the Strait of Hormuz.
Trump also says Iran is not ready to make a deal because "they keep fighting," while Secretary of State Marco Rubio signals Tehran will continue to face consequences under what he describes as Trump's "head for an eye" approach.
@TreyYingst breaks down the latest.