After Kate Middleton's name appeared on the carriage procession list at Royal Ascot, a corrected list was issued that showed the Princess of Wales wasn't attending the event. What happened behind the scenes?

LONDON (AP) — The Princess of Wales canceled plans to attend Royal Ascot on Wednesday as she continues to balance the demands of her public duties against the realities of her recovery from cancer.

Catherine, Princess of Wales, was not at Royal Ascot on Wednesday, with a royal source citing her need for balance as she returns to public engagements after being treated for cancer last year.