What does it take to be Foreign Secretary?

What does it take to be Foreign Secretary? There's been a mixed reaction to the appoint of the flamboyant former mayor of London, Boris Johnson, as Britain's Foreign Secretary. Mr Johnson has made a number of controversial comments in the past which could now have an impact on his work. Former Foreign Secretaries around the world tell us what the challenges are and how you overcome them.

Image: Newly appointed Foreign Secretary Boris Johnson addresses staff inside the Foreign and Commonwealth Office, London
Credit: AFP