https://apnews.com/89f9966c2b082980a085cdf41c1cd555

DENVER (AP) — The sun was almost setting when 14-year-old Daniel Giffin crossed the finish line on his electric mountain bike last August, nearly the last in the pack of thousands of cyclists riding across the state of Iowa in the stifling late-summer heat.

Beneath his teal helmet, patches of Daniel’s shaggy brown hair were loose from his 48th radiation treatment. His left foot and lower leg were weak from a cancerous tumor — once half the size of a human fist — lodged on the right side of his brain.