The Prince Of Wales And The Duchess Of Cornwall Visit Canada - Day 4 [Getty Images]

WINNIPEG, MB - MAY 21: Prince Charles, Prince of Waless shown a 3D printing system as he visits 'Innovation Alley' on May 21, 2014 in Winnipeg, Canada. The Prince of Wales and Duchess of Cornwall are on a four day visit to Canada. (Photo by Chris Jackson/Getty Images)

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