In case you missed it, Dutch swimmer Maarten van der Weijden won the gold medal in the men's open-water swim marathon. His win is significant in itself, but even more so because just 7 1/2 years ago he was in a desperate struggle, battling leukemia. He won that battle because of an adult stem cell transplant. The gold medalist is only one of thousands of lives saved by adult stem cells, the only stem cell showing any success with patients.