President Trump said Wednesday that South Korea can build a nuclear-powered submarine.

"Our Military Alliance is stronger than ever before and, based on that, I have given them approval to build a Nuclear Powered Submarine, rather than the old fashioned, and far less nimble, diesel powered Submarines that they have now," the president wrote on Truth Social during a multiday visit to South Korea.

Mr. Trump added that the submarine will be built in Philadelphia, as the president and lawmakers seek foreign investments as a way to boost the American shipbuilding industry. A South Korean company bought the Philly Shipyard last year.

During a meeting with Mr. Trump earlier Wednesday, South Korean President Lee Jae Myung said he's looking for U.S. support in getting nuclear fuel for su

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