When Billy Welsh went on social media more than two years ago and said he urgently needed a new kidney, his former US marines comrade John Gladwell stepped up and donated one of his. After their time in the service they didn't talk much, but social media has a way of fixing that...and for a good reason. Here, they share their incredible story of reconnecting for a life-changing kidney transplant and now going to the Super Bowl together. They each supported a different team, but ultimately that didn't matter. Check this out.