Dai Guohong from China lost his legs in 2008 during the Wenchuan earthquake when the roof of his school fell on him and buried him and 52 of his classmates. Only 26 of them survived. But Dai Guohong never gave up. He started swimming and succeeded. Now he is preparing for 2012 London Paralympics.

Aimee Mullins was born without fibula bones in her legs. When Aimee was just one year old doctors had to amputee her legs below the knees. But the girl never gave up.