US President Donald Trump defended Saudi Crown Prince Mohammed bin Salman Tuesday over the 2018 killing of journalist Jamal Khashoggi, insisting the kingdom's de facto ruler "knew nothing" about the murder as he wooed him at White House.

The United States and Saudi Arabia approved a civilian nuclear deal and the sale of F-35 jets as Trump sought to brush the murder and dismemberment of the Washington Post columnist under the carpet.

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