Who watched the royal wedding of Prince William and Princess Kate?

There is no such person as "Princess Kate" - the last Princess Kate, Catherine of Aragon, lived almost five hundred years ago. If you mean the Duchess of Cambridge, she is correctly titled the Princess WILLIAM. Only princesses who are born royal or made princesses in their own right may use their given names preceded by the title "Princess" - princesses by marriage take the feminine titles and styles of their husbands only by courtesy.

To answer your question, I imagine that TRH The Duke and Duchess of Cambridge simply had other commitments.

They didn't receive an invitation and neither did Prince Harry as he was too new to be included in a family event.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.