When James Harrison was 14, he got really sick. One of his lungs had to be removed, and he needed a lot of blood.
"I was in the hospital for three months and I had 100 stitches," he recalls.
After receiving 13 units — almost 2 gallons — of donated blood, Harrison knew right away that he wanted to give back.
"I was always looking forward to donating, right from the operation, because I don't know how many people it took to save my life," he says. "I never met them, didn't know them."