A tattoo of the Olympic rings is pictured on a Chinese competitor Ren's leg as she rest after an injury...
A tattoo of the Olympic rings is pictured on a Chinese competitor Ren Chengyuan's leg as she rest after an injury during the International Mountain Bike Challenge at the mountain bike circuit, which is part of the X-Park, at the Deodoro Sports Complex in Rio de Janeiro, Brazil, October 11, 2015. The International Mountain Bike Challenge is a test event for the Rio 2016 Olympic Games. REUTERS/Pilar Olivares