Marine's journey from cancer patient to Ironman competitor (and college student)
Just months after being diagnosed, he began training, and even now that his cancer is considered stage 4, he's in Hawaii for a world championship event.
"It's like the harder something is, the more he has to prove and the harder he gets into it," said Grace Van Der Byl, Treska's swim coach.
On Saturday, he will compete in the 2010 Ford Ironman World Championship in Kona, Hawaii.
"He's very focused," said Nathaniel Donnelly, a former Marine and, like Treska, a student at San Diego State.
Read more: "Ironman contestant's biggest foe? Cancer."
-- Tony Perry
Photo: Clayton Treska at a June event. Credit: Team Treska