Host Ira Glass talks with some real-live NASA astronauts: Cady Coleman, Chris Cassidy, and Marsha Ivins. On average, NASA schedules just a couple of space missions a year. But it employs 95 astronauts. This means that only a tiny percentage of an astronaut's career is actually spent in space, and some never get there. Ira talks with these three astronauts about how they spend the vast majority of their time: on the ground, in an office, doing paperwork. (8 minutes)