Soldier's New Legs
He was serving in Iraq when it happened. A rocket ripped through the truck Staff Sergeant Heath Calhoun was riding in. The explosion blew off both legs above the knees. Unfortunately this scenario is not uncommon for soldiers in combat. What's amazing is that technology is helping many of these soldiers walk again. Sergeant Calhoun is teaming up with researchers at Mayo Clinic to help make prosthetics even better.