Been watching many different events and amazed watching these athletes. Wheelchair basketball and rugby along with goal ball are three of my favorites, but the triathlon and swimming events were spectacular. Can't imagine all the training it takes for men and women sightless or without arms or legs to compete. 

Probably the most amazing thing I watched was when Kendall Gretsch won the wheel chair triathlon where the athletes must use a recumbent handcycleon on the bike course and a racing wheelchair on the run segment. She made up about five lengths in the in last 20 yard to win by .01 seconds. 

In some of the events for sightless athletes, guide are used for triathlon swimming and track. Many of the guides are world class athletes in their own right. Still learning all the classifications, but sure is fun to watch!