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Britain's Prince William leaves a tribute message as he leaves a memorial service on the first anniversary of the Manchester Arena bombing, in Manchester

Britain's Prince William leaves a tribute message as he leaves a memorial service on the first anniversary of the Manchester Arena bombing, in Manchester, Britain, May 22, 2018. Paul Ellis/Pool via Reuters

Royals William and Kate in Singapore

Britain's Prince William and his wife Catherine arrive in Singapore Tuesday, kicking off a nine-day Southeast Asian and Pacific tour marking Queen

Elizabeth II's Diamond Jubilee.