Frost interviews Richard Nixon and Muhammad Ali

Sir David Frosts' list of interviewees included virtually every US president and British prime minister during his working life and sporting stars, including Muhammad Ali.

During his series of five interviews with Nixon, the notoriously slippery former president known as "Tricky Dicky" dramatically admitted that he had "let down the country".

Watch clips from Frosts' interview with Nixon and Ali:

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Sir David Frost dies aged 74

Broadcaster Sir David Frost has died aged 74 of a suspected heart attack.