LONDON, ENGLAND - APRIL 05:  Catherine, Duchess of Cambridge and Prince Harry attend Service of Hope at Westminster Abbey The multi-faith Service of Hope was held  for the four people killed when Khalid Masood committed an act of terror in Westminster on Wednesday March 22.   Survivors, bereaved families and members of the emergency services joined The Duke and Duchess of Cambridge, Prince Harry, the Home Secretary, Amber Rudd and London Mayor, Sadiq Khan, in the congregation.  (Photo by Samir Hussein/WireImage)