Dropping Out - A billionaire's program to pay students with promising ideas to drop out of college is attracting students and critics. Internet business pioneer Peter Thiel thinks his program is a viable alternative to what he sees as a costly and ineffective university system. Hard Cases - The last resort for patients with rare, undiagnosed medical conditions is Dr. William Gahl's Undiagnosed Diseases Program at the National Institutes of Health. Roger Waters - Pink Floyd's creative force is still performing the rock opera "The Wall" to sold-out stadiums around the world.