LONDON: Prince William and the Princess of Wales will be looking to focus attention on their Earthshot Prize for environmental innovators when they make their first visit to the United States in eight years this week, a trip clouded by tensions with William's brother, Prince Harry, and his wife, Meghan, who have criticized Britain's royal family in the American media.

William and his wife, Catherine, will travel to Boston on Wednesday for three days of public engagements before announcing the prize winners on Friday in a ceremony headlined by pop star Billie Eilish.