Dr. David Hilmers is a four-time shuttle astronaut who became a medical doctor after his NASA career. Dr. Hilmers has been on countless mission trips all over the world.







Rick Houston planned to become a minister before he discovered journalists have delete keys at their disposal! In more than 20 years as a full-time writer, Rick has written five books and covered everything from NASCAR to NASA. He's also a deacon in his church and regularly contributes to Stand Firm, a men's devotional magazine published by LifeWay. While writing a book on the space shuttle program, Rick interviewed Dr. Hilmers, and together they launched their own book project.