Kate announced Friday that she would attend the King’s Birthday Parade after making progress in her treatment. She disclosed in March that she was undergoing chemotherapy for an unspecified form of cancer. The annual event is also a show of stability by the monarchy after months in which both the king and Kate, wife of heir to the throne Prince William, have been sidelined by cancer treatment. LONDON (AP) — Britain is putting on a display of birthday pageantry Saturday for King Charles III, a military parade that will be the Princess of Wales ' first public appearance since her...