NASA promotes Discovery's mission to return astronauts to space more than two years after the Columbia accident. The website offers an overview of the flight mission and the crew members. Individuals can view images and videos of the scientists preparing for the space shuttle mission. Through short, informational videos, students can learn how the main engines, external airlock, parachutes, and other machines used during a space mission function. Scientists can read more in-depth discussions of the instruments. This website allows users to better understand the many components needed to complete a space mission.