On 2 October 1963, American photographer Stanley Tretick took the best picture of his life – a photo of President John F Kennedy working at the Resolute Desk in the White House, with his two-year-old son ‘John-John’ peeking out a secret door underneath.

The photo was published in Look magazine a month later, days after the President was assassinated.

Rachel Naylor uses the transcript of an interview with Stanley, provided by the John F Kennedy Library and Museum, to tell the story of how he captured his most famous shot.

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(Photo: The photo Stanley Tretick took of JFK and his son. Credit: Alamy)