When JFK was assassinated in 1963, his ambition to be the first sitting American president to visit Australia died with him. 

But for the last year, his daughter, Caroline Kennedy, has served as the American ambassador to Australia. She’s here during a particularly critical time for the alliance between the United States and Australia, which is arguably more important for our safety than at any time since World War II. 

Today, foreign affairs and national security correspondent Matthew Knott on the diplomatic tightrope Kennedy must walk to strengthen  the connection between the US and Australia, and whether the American government might soon be in a position to set Julian Assange free.