Mission Specialists are astronauts who have specific expertise and responsibilities during space missions. They are trained to handle various tasks, such as conducting experiments, operating equipment, and performing spacewalks. Their skills complement those of the Commander and other crew members, ensuring the mission's success. These specialists often have backgrounds in fields like engineering, science, or medicine. For example, a Mission Specialist might be a biologist studying the effects of microgravity on living organisms. Their training prepares them to address challenges that arise during missions, making them essential to the overall team.