Britain's Catherine, Duchess of Cambridge, (L) listens as Paramedic Dan Farnworth recalls a traumatic incident that he witnessed, during an event to celebrate World Mental Health Day, at County Hall in central London on October 10, 2016.
The Duke and Duchess of Cambridge, along with Prince Harry, were due to speak at an event recognising World Mental Health day. / AFP / POOL / Richard Pohle        (Photo credit should read RICHARD POHLE/AFP/Getty Images)