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David Oliver

DAEGU, SOUTH KOREA - AUGUST 29: David Oliver of United States looks on after competing in the men's 110 metres hurdles semi finals during day three of the 13th IAAF World Athletics Championships at the Daegu Stadium on August 29, 2011 in Daegu, South Korea. (Photo by Andy Lyons/Getty Images)

Olympians' tattoo art

Sporting

the colors of the country they represent is gratifying enough for most

Olympic athletes. For others, an ink gun provides the opportunity to

express themselves in a more permanent way.