A grandfather is well on his way to running the equivalent of 420 marathons to help his granddaughter, and he's doing it at a great disadvantage.
At 62, David Kuhn isn't your average long distance runner, because he's blind.
Kuhn is averaging about 20 miles each day as he crisscrosses the country to raise awareness and money for cystic fibrosis.
He started his journey in May and is running around the perimeter states of the U.S., which is approximately 11,000 miles. Kuhn is doing all of this for his 12-year-old granddaughter Kylie, who has the disease.
"I'm fear driven," he said. "I want to do everything I can do for my granddaughter to extend her life and for those who are struck with this disease. My pain, my suffering, my struggling is nothing compared to those."
Kuhn wears a runner's GPS to track his miles. And because of his blindness, he runs with a partner or on high school tracks.
To follow Kuhn's journey on his blog, click here.
Blind man running 11,000 miles for sick granddaughter