The World Tonight

During a visit to the White House, Donald Trump said Saudi Crown Prince Mohammed bin Salman ‘knew nothing’ about the 2018 murder of Washington Post journalist Jamal Khashoggi. We hear reaction from Khashoggi’s former editor, Marty Baron. Also on the programme: Poland’s foreign minister on suspected Russian sabotage of his country’s railways. And crouching woman, draped goose - we hear about the earliest known depiction of interaction between a human and an animal.