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Britain's Catherine, Duchess of Cambridge (3L), her husband Britain's Prince William, Duke of Cambridge (C), and his brother Britain's Prince Harry (R), travel in a pod of the London Eye with members of the mental health charity 'Heads Together' during an event to celebrate World Mental Health Day, in central London on October 10, 2016. The Duke and Duchess of Cambridge, along with Prince Harry, were spoke at an event recognising mental health issues on World Mental Health day. / AFP / POOL / RICHARD POHLE (Photo credit should read RICHARD POHLE/AFP/Getty Images)

Britain's Catherine, Duchess of Cambridge (3L), her husband Britain's Prince William, Duke of Cambridge (C), and his brother Britain's Prince Harry (R), travel in a pod of the London Eye with members of the mental health charity 'Heads Together' during an event to celebrate World Mental Health Day, in central London on October 10, 2016.
The Duke and Duchess of Cambridge, along with Prince Harry, were spoke at an event recognising mental health issues on World Mental Health day. / AFP / POOL / RICHARD POHLE        (Photo credit should read RICHARD POHLE/AFP/Getty Images)