@cbcnews: Kate Middleton will attend the Trooping the Colour event in London this weekend – marking her first appearance in public since her cancer diagnosis. The military parade is held in London to celebrate the reigning monarch's official birthday and is one of the most significant annual events for the Royal Family. In a statement, the Princess of Wales said she is still being treated for an undisclosed form of cancer that was discovered after abdominal surgery in January but feels well enough to attend the event on Saturday. #Royals #KateMiddleton #RoyalFamily