FILE - A montage of the front pages of some of Britain's Sunday newspapers pictured in London, March 24, 2024. Support has poured in from around the world for Kate, the Princess of Wales, after she revealed in a candid video message that she is undergoing chemotherapy for cancer following major abdominal surgery. (AP Photo/Alastair Grant, File)
FILE - Britain's King Charles III and Queen Camilla greet people after attending the Easter Matins Service at St. George's Chapel, Windsor Castle, England, March 31, 2024. King Charles III is on the comeback trail. The 75-year-old British monarch will slowly ease back into public life after a three-month break to focus on his treatment and recuperation after he was diagnosed with an undisclosed type of cancer. (Hollie Adams/Pool Photo via AP, File)
FILE - Britain's King Charles III inspects the guard of honor on a visit to meet Royal Marines and Kenyan Marines at Mtongwe Naval Base, in Mombasa, Kenya on Nov. 2, 2023. King Charles III is on the comeback trail. The 75-year-old British monarch will slowly ease back into public life after a three-month break to focus on his treatment and recuperation after he was diagnosed with an undisclosed type of cancer. (Luis Tato/Pool Photo via AP, File)
FILE - Britain's King Charles III, center, poses for a photograph with secondary school students during his visit to the Eastlands Library to learn about a project that restores old libraries and encourages reading amongst children in the community in Makadara district of Nairobi, Oct. 31, 2023. King Charles III is on the comeback trail. The 75-year-old British monarch will slowly ease back into public life after a three-month break to focus on his treatment and recuperation after he was diagnosed with an undisclosed type of cancer. (Thomas Mukoya/Pool Photo via AP, File)
FILE - Britain's King Charles III, second right, pays a visit to the Notre-Dame de Paris Cathedral rebuilding site in Paris, Sept, 21 2023. King Charles III is on the comeback trail. The 75-year-old British monarch will slowly ease back into public life after a three-month break to focus on his treatment and recuperation after he was diagnosed with an undisclosed type of cancer. (Christophe Petit Tesson/Pool via AP, File)
FILE - German President Frank-Walter Steinmeier, right, and his wife Elke Buedenbender, left, welcome Britain's King Charles III and Queen Camilla, in front of the Brandenburg Gate in Berlin, March 29, 2023. King Charles III is on the comeback trail. The 75-year-old British monarch will slowly ease back into public life after a three-month break to focus on his treatment and recuperation after he was diagnosed with an undisclosed type of cancer. (AP Photo/Matthias Schrader, File)
FILE - Britain's King Charles III and Queen Camilla arrive to attend the Christmas day service at St Mary Magdalene Church in Sandringham in Norfolk, England, Dec. 25, 2023. King Charles III is on the comeback trail. The 75-year-old British monarch will slowly ease back into public life after a three-month break to focus on his treatment and recuperation after he was diagnosed with an undisclosed type of cancer. (AP Photo/Kin Cheung, File)
FILE - Britain's King Charles III, center, walks in the Coronation Procession after his coronation ceremony at Westminster Abbey in London, May 6, 2023. King Charles III is on the comeback trail. The 75-year-old British monarch will slowly ease back into public life after a three-month break to focus on his treatment and recuperation after he was diagnosed with an undisclosed type of cancer. (AP Photo/Kirsty Wigglesworth, Pool, File)
FILE - Britain's King Charles III leaves The London Clinic in central London, Jan. 29, 2024. King Charles III was in hospital to receive treatment for an enlarged prostate. King Charles III is on the comeback trail. The 75-year-old British monarch will slowly ease back into public life after a three-month break to focus on his treatment and recuperation after he was diagnosed with an undisclosed type of cancer (AP Photo/Alberto Pezzali, File)