Buckingham Palace did not announce what kind of cancer the king has, but he remains optimistic about his treatment.
Read MoreThe First Lady traveled to London solo, as President Biden would not be in attendance.
Read MoreAfter serving the British Kingdom for 70 years, Queen Elizabeth II, 96, died in September.
Read More“If you’ll forgive the poor attempt at Irish: Ta me sa bhaile,” Biden said. “I’m at home.”
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