David's mom waited and waited and waited. David was three and a half and he still couldn't walk. He could crawl really well, and he could stand up, just, but he couldn't walk And then, on his fourth birthday just before David's birthday party was about to start, his mom called the hospital and made an appointment to go to the doctor the very next day. But would you believe it? What happened next is the story of how he became a gold medal winner in...