CNN Sanjay Gupta MD November 9, 2013 21:57:00
>> for more than three decades now don horton's life has been mostly football. >> division i, division i, division iii and also a high school coach. all very rewarding experiences. >> then in 2006 don became one of the 60,000 americans diagnosed every year with parkinson's disease. perhaps the worst day came in 2009. that's when don found himself unable to button his own shirt. russell wilson, who's now a quarterback with the seattle seahawks, helped don with his buttons so their team could get back on the road. >> it's just a humbling experience to be helpless. know you got to do something, y...