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2012 Team USA Media Summit

DALLAS, TX - MAY 13: Taekwondo athletes and brother and sister, Diana Lopez and Steven Lopez pose for a portrait during the 2012 Team USA Media Summit on May 13, 2012 in Dallas, Texas. (Photo by Nick Laham/Getty Images)

Sibling rivalry at the Olympics

The competition is already fierce as Olympic athletes strive for a gold medal, but the heat intensifies when athletes’ siblings are thrown into the mix. Whether they’re teammates, training partners, or in the midst of an intense rivalry, these Olympic siblings from all over the world will push each other to perform their best this year for country and family pride. --By Paul Rosales and Carla Thorpe, Yahoo! Sports