Queen Elizabeth II has sprained her back, Buckingham Palace says, keeping her from attending 'Remembrance Sunday' after several weeks of heightened concern over the state of the 95-year-old monarch's health. The queen's decision, which was announced Sunday morning just a few hours before she was scheduled to appear, was made with "great regret" and "disappointment" over missing the service, the palace told USA TODAY in a statement. The palace said just days ago the queen was determined not to miss Remembrance Sunday, a sacred ceremony in the royal diary that usually brings out most of the senior royals. 📸 Jacob King, AFP via Getty Images