The Prince Of Wales And The Duchess Of Cornwall Visit Washington, DC - Day 2 [Getty Images]

WASHINGTON, DC - MARCH 18: Prince Charles, Prince of Wales attends an event about reduction of plastic waste in the marine environment on the second day of a visit to the United States on March 18, 2015 in Washington, DC. The Prince and Duchess are in Washington as part of a Four day visit to the United States. (Photo by Arthur Edwards - Pool / Getty Images)

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