FILE - Britain's Queen Elizabeth II greets the crowds as she rides with Prince Phillip in an open top car to celebrates her 90th birthday in Windsor, England, Thursday, April, 21, 2016. Queen Elizabeth II is marking her 96th birthday privately on Thursday, April 21, 2022 retreating to the Sandringham estate in eastern England that has offered the monarch and her late husband, Prince Philip, a refuge from the affairs of state. (AP Photo/Alastair Grant, File)