Polio. It's a disease we rarely talk about anymore because the last known case in the U.S. was nearly 30 years ago. But as many as 40-percent of those who contracted the disease then are now suffering from post-polio syndrome. That's the bad news. The good news is a new therapy that's giving hope to many who have suffered through decades of muscle weakness, joint pain, and fatigue. Scott Wasserman reports. See the video report .. here (link no longer available).