"It got to the point where, when I was going through the process of being tested, if (the doctors) had told me that I couldn't donate I would have been devastated," said Walter, who is now outspoken about the importance of organ donation and works with the National Kidney Foundation to get the word out. "It would have taken me a long time to get over that because I had just wrapped my mind around it that, 'Hey, this is what I'm going to do and nothing's going to stop me from doing it.'"