CNN javelin star overcomes amputation to become leading para-athlete . Oscar Pistorius a promising handball player before developing bone cancer in leg . Left leg amputated above knee in Next year ; sports career revitalized by job at prosthetic firm . Icelandic-based Ossur provided running blades for European sprinter Helgi Sveinsson .
Icelandic javelin star overcomes amputation to become leading para-athlete . Helgi Sveinsson a promising handball player before developing bone cancer in leg . Left leg amputated above knee in 1999 ; sports career revitalized by job at prosthetic firm . Icelandic-based Ossur provided running blades for South African sprinter Oscar Pistorius .