Coloradan David Klaus was a launch commander for NASA when the space shuttle Challenger exploded 30 years ago. He's now a professor of aerospace engineering at the University of Colorado Boulder, and he talks about his memories of that day. Then, a new exhibit that one artist hopes inspires the state's art community. Also, they're called "sharrows" and they're meant to prevent collisions between bicyclists and cars, but do they work? Then, a look back at Beat writer Neal Cassady's time in Denver.