Chris Ring is a former SEAL who was the first American to swim the entire Mississippi river to raise awareness of military casualties and their families.  Oddly, for a SEAL, he's not really that fond of swimming, but swimming the Mississippi seemed like the right thing to do, so he did it. Hear how about his SEAL training, deployment, and the Mississippi swim. Find out how he was able to use mental toughness and an Unbeatable Mind to endure and overcome challenges.