TETBURY, UNITED KINGDOM - JULY 18:  Princess Diana With Her Sons Prince William And Prince Harry Playing On A Slide In The Gardens Of Highgove House. The Boys Are Wearing The Uniforms Of The 1st Battalion Of The Parachute Regiment Of Which Their Father Is The Colonel-in-chief. Princess Diana Is Wearing A Gingham Style Pair Of Trousers.  (Photo by Tim Graham Photo Library via Getty Images)