Swimmer Herendeen, following extensive knee surgery, is eager to win a medal at Rio in his final Paralympics

Dalton Herendeen was ready to retire after injuring his knee in 2015 during the Paralympic World Championships. But the swimmer had surgery and rehab and has persevered. Now he's heading to his second Paralympics, this time intent to win a medal. My story for TeamUSA.org: http://www.teamusa.org/US-Paralympics/Features/2016/August/30/Once-Ready-To-Retire-Swimmer-Dalton-Herendeen-Instead-Is-Ready-For-Rio